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Lion's mane is marketed for memory and focus, but do the human trials back it up? Here's what the research actually shows, dose by dose.

Ashwagandha has become the default answer to almost every stress question online — take the root, watch your cortisol fall, feel calmer by Tuesday. The reality is more interesting than that, and a bit messier. There's genuine clinical research behind ashwagandha and cortisol. It's just worth knowing what the studies actually measured, at what dose, and where the evidence quietly runs out. What cortisol is actually doing when you're stressed Cortisol is a hormone released by your adrenal glands as part of the hypothalamus-pituitary-adrenal (HPA) axis — the body's built-in stress-response system. In short bursts, it's useful: it sharpens focus and mobilises energy to get you through whatever's in front of you. The problem is when it stays elevated for weeks on end, quietly chipping away at sleep, mood, and patience. Ashwagandha is classed as an adaptogen, a term for plants thought to help the body regulate that HPA-axis response rather than switch it off entirely.[1] What the trials on ashwagandha and cortisol actually show The evidence base here is bigger than most supplements get. A steady run of randomised, placebo-controlled trials — mostly small, mostly running 6 to 12 weeks — has tested standardised ashwagandha root extracts against placebo in adults reporting everyday stress. Across them, daily doses ranging from 240mg to 600mg have produced measurable reductions in serum cortisol compared with placebo, with the larger effects generally showing up at 500-600mg/day.[1] One of the better-known trials puts this in concrete numbers. Sixty stressed adults took either a standardised 240mg ashwagandha extract or a placebo, once daily, for 60 days.[2] 27.9% vs 7.9% Drop in morning cortisol after 60 days on a standardised 240mg ashwagandha extract, versus the placebo group in the same trial That's one study, on one specific extract, at one specific dose — not every ashwagandha capsule on a shelf, and not a promise that any particular product will replicate it exactly. But it's a fair, real example of what "ashwagandha lowers cortisol" is actually built on. Feeling less stressed and testing lower for cortisol aren't automatically the same thing Here's the part that tends to get skipped. A 2025 systematic review and meta-analysis pooling 15 trials and 873 adults found ashwagandha produced statistically significant reductions in cortisol, and in validated stress and anxiety scores.[3] But a separate meta-analysis of eight trials in 488 adults found something messier: cortisol came down, yet people's own ratings of how stressed they felt didn't shift any more than the placebo group's did.[4] Cortisol dropping on a lab test and feeling calmer are not automatically the same thing, and the research doesn't fully agree on how tightly the two are linked. Both findings can be true at once — a biological marker shifting doesn't guarantee a felt difference for every person, especially over trial windows as short as six to eight weeks. It's a reasonable case for cautious optimism, not a guarantee of how you personally will feel. Dose and extract matter more than the word "ashwagandha" on the label This is where most of the confusion comes from. "Ashwagandha" isn't one standardised thing. Trials have used root extracts, root-and-leaf extracts, and different proprietary formulas — KSM-66, Shoden and Sensoril among them — standardised to different withanolide percentages, at doses ranging from 120mg to well over 1,000mg a day. A taskforce from the World Federation of Societies of Biological Psychiatry has provisionally recommended 300-600mg/day of a root extract standardised to 5% withanolides for generalised anxiety, while noting more data is still needed before that can become a stronger recommendation.[1] Which extract, not just "ashwagandha" — named, studied extracts like KSM-66 and Shoden have a trial history behind them; generic "root powder" usually doesn't. Withanolide standardisation — look for a stated percentage (commonly 5%), not just a milligram figure sitting on its own. Dose per serving — most of the stress research clusters around 300-600mg/day. Third-party testing — independent lab verification matters more for botanicals than most supplement categories, given how variable raw plant material can be. Oxford Origins' Ashwagandha KSM-66 uses KSM-66 — the 12:1 full-spectrum root extract behind a good portion of the research above — in a single 1281mg daily capsule, boosted with a 95% piperine black pepper extract for absorption. Worth being precise here: the exact cortisol figures from any one trial won't map onto any one product, capsule for capsule. What KSM-66 gives you is an extract with an actual, named research trail behind it, rather than an unspecified "ashwagandha" sitting on an ingredients list. The Golden Pick Ashwagandha KSM-66 12:1 full-spectrum extract · 1281mg · black pepper boosted £12.95● OUT OF STOCK View Ashwagandha KSM-66 → If timing is the thing you're trying to get right — morning versus evening, with food or without — we've covered that in more depth in our guide to the best time to take ashwagandha. Who should be cautious with ashwagandha Ashwagandha has a reasonably good short-term safety record — trials running up to about three months report mostly mild side effects, things like an upset stomach or drowsiness.[1] That doesn't make it nothing, and it isn't right for everyone. It can affect thyroid hormone levels, so it needs caution if you have a thyroid condition. A small number of liver injury cases have been reported, generally at higher doses or alongside other medications.[1] It isn't recommended during pregnancy or while breastfeeding, and it may not be appropriate for men with hormone-sensitive prostate cancer, given its effect on testosterone in some trials.[1] In the UK, herbal supplements including ashwagandha can be sold either as standard food supplements or, for some products, under the MHRA's Traditional Herbal Registration scheme, which sets safety and quality standards without requiring proof of effectiveness.[5] Neither route replaces a conversation with your GP, particularly if you're on other medication or managing an existing condition. We go into more detail on the regulatory side in our piece on ashwagandha's legal status in the UK. None of this makes ashwagandha a fix for a stressful life — nothing in a capsule replaces sleep, boundaries, or an actual day off. What the research does support, cautiously, is a real physiological effect worth taking seriously, provided the extract, dose and person are the right match. That's the standard we've built the KSM-66 formula around: not the loudest claim on the shelf, just the ingredient that's actually been studied properly, at an amount that's actually shown up in the trials. Frequently asked questions How long does it take for ashwagandha to lower cortisol? Most of the placebo-controlled trials run 6 to 12 weeks, and that's genuinely the timeframe to expect — this isn't a same-day effect. The 60-day trial mentioned above saw its biggest cortisol drop by the end of that period, not the first week. For more on timing, including whether morning or evening dosing makes a difference, see our guide on the best time to take ashwagandha. Can you take ashwagandha every day, or does it need cycling? Most of the clinical trials used daily dosing without a break, for up to around three months, without notable safety issues. There isn't strong evidence either way on cycling — taking planned breaks — and beyond about three months the research thins out considerably. Treat continuous long-term use as an open question rather than a settled one, and check in with your GP if you're taking it for months on end. Is ashwagandha legal and safe to buy in the UK? Yes — ashwagandha is legally sold in the UK, either as a food supplement or, for some products, under the MHRA's Traditional Herbal Registration scheme. That's a regulatory route around quality and safety standards, not a guarantee of effectiveness. We cover exactly how that works in our full piece on ashwagandha's legal status. What's the difference between KSM-66, Sensoril and Shoden ashwagandha? They're different proprietary extracts, made from different parts of the plant and standardised differently. KSM-66 is a root-only extract standardised to a minimum 5% withanolides and has one of the largest bodies of published research behind it. Sensoril uses root and leaf and tends to run at a higher withanolide concentration. Shoden is also a root extract, standardised differently again, and was the specific extract used in the 240mg cortisol trial referenced above. None is definitively "better" across the board — the honest answer is that each has its own, separate trial evidence, so it's worth checking which extract, not just the word "ashwagandha," backs whatever you're taking. Sources NIH Office of Dietary Supplements — Ashwagandha Health Professional Fact Sheet, covering HPA-axis mechanism, dosing evidence, and safety data. https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/ Lopresti AL, Smith SJ, Malvi H, Kodgule R. "An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: A randomized, double-blind, placebo-controlled study." Medicine (Baltimore) 2019 — cited for the 27.9% vs 7.9% cortisol figure. https://pubmed.ncbi.nlm.nih.gov/31517876/ "Effects of Ashwagandha Supplements on Cortisol, Stress, and Anxiety Levels in Adults: A Systematic Review and Meta-Analysis." BJPsych Open, 2025 — 15 studies, 873 adults. cambridge.org Albalawi AA et al. "Dual impact of Ashwagandha: Significant cortisol reduction but no effects on perceived stress – A systematic review and meta-analysis." 2025 — cited for the cortisol/perceived-stress disconnect. journals.sagepub.com GOV.UK / MHRA — "Apply for a traditional herbal registration (THR)," cited for UK herbal supplement regulation. https://www.gov.uk/guidance/apply-for-a-traditional-herbal-registration-thr At Oxford Origins, your wellbeing is our priority, and although we pride ourselves on our expertise in nutrition and supplementation, it's important to acknowledge the individuality of each person. Articles published by Oxford Origins are not intended to treat, diagnose, cure or prevent any disease, or replace the advice of your GP. We always recommend consulting with a healthcare provider if you encounter any health concerns, and we'll always be here to support you so you're never alone on your journey.

You've been tired for weeks. Not the normal kind — the kind a full night's sleep doesn't touch, where the stairs feel steeper than they used to, where a session at the gym leaves you flattened for the rest of the day. Before you reach for another supplement, it's worth asking a more specific question: is this iron? Iron deficiency is one of the most common nutritional gaps in the UK, and women carry most of that burden — not through any fault of their own, but because of what their bodies do every month. Here's what the evidence actually shows about the signs, who's genuinely at risk, and when supplementing helps versus when it's papering over something only a blood test would catch. The signs worth mentioning to your GP Iron deficiency builds slowly, which is exactly why it's easy to write off as "just being busy" or "getting older." The NHS lists a fairly specific set of symptoms, and a handful come up often enough to be worth naming directly.[1] Fatigue that doesn't lift with rest — the most common complaint, and the easiest one to dismiss. Paler skin, breathlessness or heart palpitations — signs your blood is carrying less oxygen than it should. Hair shedding more than usual, or spoon-shaped nails — visible changes that often get blamed on stress first. Restless legs, or an odd craving for non-food items like ice — less common, but specific enough to flag to a GP by name. Why this lands on women specifically The UK Reference Nutrient Intake for iron is 14.8mg a day for menstruating women aged 19 to 49, against 8.7mg for men and postmenopausal women — the widest sex-based gap in any standard nutrient table, and it exists for one plain reason: monthly blood loss.[2] We've written before about how few nutrients actually justify a separate "women's" formula — iron is the one that genuinely does. Heavy periods, known clinically as menorrhagia, are — alongside pregnancy — the leading cause of iron deficiency anaemia in women of reproductive age, according to the NHS.[1] The numbers bear that out. A recent analysis of the National Diet and Nutrition Survey found that around one in five UK women of reproductive age are iron deficient, with more than a quarter falling short of the lower reference nutrient intake in their diet altogether.[3] 1 in 5 UK women of reproductive age estimated to be iron deficient, per National Diet and Nutrition Survey data What a blood test actually tells you Here's the part that's easy to skip: you can't diagnose iron deficiency from symptoms alone, and guessing wrong in either direction has consequences. A GP will usually run a full blood count — no special preparation needed — to check your red blood cell levels before recommending anything.[1] If the cause isn't obvious, they may look further, including checking for blood loss elsewhere in the body. This matters because treatment for a confirmed deficiency looks different from general maintenance. NHS-prescribed iron tablets for anaemia are typically taken for around six months and dosed considerably higher than what you'd find in a daily supplement — because they're correcting a measured shortfall, not topping up a borderline diet.[1] Topping up a gap versus treating a diagnosis If your blood test comes back normal but you know your diet runs light on iron — little red meat, not many pulses, or a heavy training schedule that increases iron turnover — a lower-dose daily supplement is a reasonable way to close that gap. That's a genuinely different job to correcting a diagnosed deficiency, and the label should reflect it. This is where a capsule dosed close to the reference intake does more good than a mega-dose you don't need. Our Vegan Iron Complex delivers 14mg of iron as ferrous fumarate, alongside 400mcg of folic acid and 100mcg of vitamin B12 — sitting close to the 14.8mg figure above rather than overshooting it. The Golden Pick Vegan Iron Complex 14mg Iron · Folic Acid & B12 · 120 Capsules £9.95● OUT OF STOCK View Vegan Iron Complex → Iron contributes to the normal formation of red blood cells and haemoglobin, to normal oxygen transport around the body, and to the reduction of tiredness and fatigue — all EFSA-authorised claims, and all reasons the mineral matters day to day, not just when a blood test flags a problem.[4] One caution worth taking seriously: iron isn't a supplement to take "just in case." Unlike most vitamins, the body has no efficient way to get rid of excess iron, so taking more than you need — especially over years — can let it build up to damaging levels. The NHS describes this build-up, known as iron overload, most commonly in the context of haemochromatosis, a genetic condition affecting the liver, joints and heart — but the underlying mechanism is the same reason unnecessary, indefinite iron supplementation isn't something to do casually.[5] This is one supplement where more is not automatically better, and it isn't something men or postmenopausal women should take routinely without a specific reason. The gold standard here is a blood test first Becoming the standard, in this case, isn't about finding the strongest supplement on the shelf. It's about matching the dose to the actual gap, and knowing when "I'm always tired" deserves a blood test rather than a guess. If your diet's the issue, a sensible daily amount is worth keeping in the cupboard. If your body's telling you something more specific is going on, that's a conversation for your GP — not the supplement aisle. Frequently asked questions How long does it take for an iron supplement to work? For a confirmed deficiency, NHS guidance is to expect around six months of treatment before iron stores fully recover, even though tiredness and other symptoms often start easing within a few weeks.[1] For a general dietary top-up rather than a diagnosed shortfall, there's no fixed timeline — it depends on how large the gap was to begin with. Can you take iron supplements every day, long-term? Only if there's a genuine reason to. A low-dose daily supplement to cover a dietary gap is generally considered low-risk for someone who needs it, but iron shouldn't be taken indefinitely "just in case" — excess iron builds up in the body rather than being excreted, and unnecessary long-term use has been linked to iron overload.[5] If you're not sure whether you need it, a blood test settles the question. What's the difference between iron deficiency and iron deficiency anaemia? Iron deficiency means your iron stores are running low. Anaemia is what happens once that shortfall is severe enough to reduce your red blood cell count and affect how well oxygen moves around your body. You can be iron deficient without yet being anaemic, which is part of why a blood test — not symptoms alone — is how a GP tells the two apart. Do vegetarians and vegans need more iron? Not necessarily more, but the iron in plant foods (non-haem iron) is absorbed less efficiently than the iron in meat (haem iron), so vegetarians and vegans often need to pay closer attention to hitting the same RNI figure. Pairing iron-rich plant foods with vitamin C — a glass of orange juice alongside a lentil dish, for example — measurably improves how much of it your body actually absorbs. Sources NHS — Iron deficiency anaemia: symptoms, causes, diagnosis and treatment. nhs.uk/conditions/iron-deficiency-anaemia British Dietetic Association — Iron Food Fact Sheet, Reference Nutrient Intake figures. bda.uk.com/resource/iron-rich-foods-iron-deficiency PMC/NIH — Association between Adiposity and Iron Status in Women of Reproductive Age: Data from the UK National Diet and Nutrition Survey (NDNS) 2008–2019. pmc.ncbi.nlm.nih.gov/articles/PMC11522960 EFSA NDA Panel — Scientific Opinion on the substantiation of health claims related to iron. EFSA Journal 2010;8(10):1740. efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1740 NHS — Haemochromatosis: overview, symptoms and complications of iron overload. nhs.uk/conditions/haemochromatosis At Oxford Origins, your wellbeing is our priority, and although we pride ourselves on our expertise in nutrition and supplementation, it's important to acknowledge the individuality of each person. Articles published by Oxford Origins are not intended to treat, diagnose, cure or prevent any disease, or replace the advice of your GP. We always recommend consulting with a healthcare provider if you encounter any health concerns, and we'll always be here to support you so you're never alone on your journey.

Three years ago, creatine was still a locker-room supplement — something you scooped into a shaker after leg day and forgot about until the next one. Now it's turning up in conversations about perimenopause, cognitive ageing and bone health, championed by physicians who've never set foot in a CrossFit box. That's a big shift for a compound that costs about ten pence a gram. So what does the actual research say, once you strip away the enthusiasm? From gym bag to bathroom cabinet: why creatine got rebranded The shift happened for a reason. Most of the original creatine research was done on young men lifting weights, which meant an entire population — women, particularly those past 40 — were left out of the picture for decades. Newer trials have started closing that gap, and what they've found isn't uniformly flattering. Some of it holds up well. Some of it doesn't. It's worth knowing which is which before you spend money on it. What creatine is actually doing in your body Creatine isn't a stimulant, a hormone, or anything exotic. Your liver and kidneys make a small amount of it daily from amino acids, and you top the rest up through red meat and fish — though not much, since a typical diet supplies roughly 1g a day. It's stored mostly in skeletal muscle, where it helps regenerate ATP, the molecule your cells burn for quick bursts of energy. That's why the oldest, strongest evidence for creatine concerns short, hard efforts: a sprint, a heavy lift. Everything newer builds outward from that same mechanism. The muscle evidence, and the one number worth remembering On strength, the research is about as settled as supplement science gets. Creatine increases physical performance in successive bursts of short-term, high-intensity exercise — an effect established enough that it's one of the few creatine claims formally authorised on the EU health claims register, at a daily intake of 3g.[1] That's not a figure picked out of the air, either — it's exactly the dose our own tablets are built around. 3g the daily intake behind every authorised creatine claim in the EU register There's a second authorised claim that matters more if you're over 55: taken alongside regular resistance training, daily creatine has been shown to enhance the effect of that training on muscle strength specifically in older adults.[2] That's a meaningfully narrower claim than "creatine makes you stronger" — it only holds alongside the resistance training. The tablet isn't doing the lifting for you. Brain health: what the memory trials actually found This is the part most of the recent headlines are about, and the honest answer is promising, but early. A 2023 systematic review and meta-analysis in Nutrition Reviews pooled ten randomised controlled trials and found creatine supplementation improved measures of memory compared with placebo — with the effect notably stronger in adults over 66 than in their younger counterparts.[3] "The effect was notably stronger in older adults than in their younger counterparts." A separate 2024 meta-analysis in Frontiers in Nutrition reached a similar conclusion for broader cognitive function, though the authors were careful to note that study designs, doses and durations varied enough that larger, more consistent trials are still needed before this becomes settled science.[4] Read that as a real signal, not yet a guarantee. Bone density: where the hype has outrun the evidence Here's where it's worth being honest rather than convenient. The most rigorous test of creatine and bone health to date is a two-year, placebo-controlled trial in 237 postmenopausal women, who took 3g of creatine daily alongside a structured resistance and walking programme. At the end of two years, creatine made no measurable difference to bone mineral density at the femoral neck, hip or spine compared with placebo.[5] It did produce some modest, more technical improvements in bone geometry — the shape and load-bearing structure of bone, rather than its density — but that's a narrower result than "creatine builds bone." If bone health is your main reason for taking it, weight-bearing exercise, calcium and vitamin D are still doing most of the actual work. How much to actually take, and what's worth checking on the label The dose that shows up across nearly every trial above — muscle, brain and bone alike — is 3g a day, taken consistently. There's no meaningful benefit to cycling on and off, and no real need to "load" with higher doses first unless you're chasing faster saturation ahead of a specific event. Creatine monohydrate, the plain, unbuffered form used in essentially all of the research cited here, remains what most sports scientists still reach for. Newer forms like HCL or buffered creatine are marketed on absorption claims the evidence doesn't yet back up. Check the form — monohydrate is what the research above actually used; other forms haven't caught up on the evidence. Check the dose — 3g is the figure behind every claim in this piece; anything meaningfully lower is unlikely to do much. Check the consistency — daily, ongoing use is what the trials tested, not occasional or pre-workout-only dosing. Three tablets a day gets you there without a scoop, a shaker or a chalky aftertaste — which is the whole idea behind our Creatine Monohydrate Tablets: one gram of monohydrate per tablet, formulated to the same 3g threshold the research keeps landing on. The Golden Pick Creatine Monohydrate Tablets 1g monohydrate per tablet · 90 tablets · 30-day supply £14.95● OUT OF STOCK View Creatine Monohydrate Tablets → It's currently between batches — worth using the notify option on the product page rather than hunting down a powder tub in the meantime. The bit worth remembering Creatine monohydrate has been studied for three decades, which is longer than almost anything else on a supplement shelf, and it keeps landing on the same handful of numbers: 3g, taken daily, alongside whatever you're already doing — lifting, walking, or just trying to think a little more clearly. It isn't a shortcut for any of that. It's a small, well-evidenced nudge underneath them, about as close to the gold standard as a supplement claim is actually allowed to get. Frequently asked questions How long does creatine take to start working? Most trials see measurable strength changes within two to four weeks of daily use, once muscle stores reach saturation. Loading with a higher dose for the first five to seven days can get you there slightly faster, though it isn't necessary — a steady 3g a day reaches the same point within about three to four weeks. Do you need to cycle creatine, or take breaks from it? No trial evidence supports cycling. The studies behind the claims in this piece used continuous daily dosing for anywhere from eight weeks to two years, with no washout periods built in and no reported need for one. Is it safe to take creatine long-term? The longest controlled trial on record ran for two years with no serious adverse effects reported, and creatine is one of the more extensively studied supplements in sports nutrition. The usual caveat applies if you have existing kidney disease or reduced kidney function: talk to your GP before starting, since creatine is processed by the kidneys and long-term data in that specific group is limited. What's the difference between creatine monohydrate and newer forms like creatine HCL? Monohydrate is the form used in essentially every trial referenced in this article, including the muscle, memory and bone research. Creatine HCL and other buffered forms are marketed on claims of better absorption or less bloating, but the EU health claims register doesn't recognise any absorption advantage for these forms, and independent trials haven't shown them to outperform monohydrate. If it's label-reading you're after more generally, our piece on whether women need a different multivitamin than men covers similar ground. Sources Commission Regulation (EU) No 432/2012 — EU-authorised health claim: creatine increases physical performance in successive bursts of short-term, high-intensity exercise, at a daily intake of 3g. https://www.legislation.gov.uk/eur/2012/432/annex Commission Implementing Regulation (EU) 2017/672 — EU-authorised health claim: creatine in combination with resistance training and improvement in muscle strength in adults over 55. https://www.legislation.gov.uk/eur/2017/672/2020-12-31/data.html Prokopidis et al., Nutrition Reviews (2023) — systematic review and meta-analysis of randomised controlled trials on creatine supplementation and memory in healthy individuals. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9999677/ Frontiers in Nutrition (2024) — systematic review and meta-analysis of creatine supplementation and cognitive function in adults. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2024.1424972/full Chilibeck et al., The Journals of Gerontology: Series A (2020) — two-year randomised, placebo-controlled trial of creatine supplementation and bone health in postmenopausal women. https://academic.oup.com/biomedgerontology/article-abstract/75/5/931/5525440 At Oxford Origins, your wellbeing is our priority, and although we pride ourselves on our expertise in nutrition and supplementation, it's important to acknowledge the individuality of each person. Articles published by Oxford Origins are not intended to treat, diagnose, cure or prevent any disease, or replace the advice of your GP. We always recommend consulting with a healthcare provider if you encounter any health concerns, and we'll always be here to support you so you're never alone on your journey.

Long before anyone ran a randomised controlled trial, someone in a kitchen somewhere was grating fresh ginger into hot water because their stomach felt wrong. That's roughly three thousand years of tradition to live up to. The question worth asking now isn't whether ginger has a reputation — it clearly does — but whether the trial evidence actually backs it, and for which kind of queasy stomach specifically. What "ginger for nausea" is actually built on The active compounds are gingerols and shogaols — the same molecules responsible for ginger's heat. Dry or cook the root and gingerols convert to shogaols, which is part of why fresh ginger tea and powdered ginger capsules don't behave identically in the body. Most of the clinical research uses standardised powder, not a mug of tea, which matters when you're comparing a study's dose to what's actually in your cupboard. Pregnancy nausea: the best-studied use case This is where the evidence is strongest, and also where you should be most careful about self-directing. NHS guidance notes there's some evidence ginger may help with nausea and vomiting in early pregnancy, alongside the standard advice to check with a pharmacist before taking any ginger supplement while pregnant.[1] A systematic review and meta-analysis pooling multiple trials found ginger reduced nausea scores compared with placebo, though the effect on actual vomiting episodes was less clear-cut, and several of the underlying trials carried a real risk of bias.[2] If you're pregnant, this is a talk-to-your-midwife-or-GP conversation, not a self-medicate one — particularly given ginger's mild blood-thinning properties, which we'll come back to. Motion sickness, post-op nausea and chemo — thinner evidence Outside pregnancy, the picture gets patchier. Trials on motion sickness and nausea after surgery generally point in ginger's favour, but the studies are smaller and less consistent than the pregnancy literature. For chemotherapy-related nausea, results across trials have been mixed enough that it isn't something oncology teams recommend as a substitute for prescribed anti-sickness medication — at best, a few people use it alongside, with their team's knowledge. "Ginger's reputation for settling a queasy stomach predates double-blind trials by about three thousand years — it just took the research a while to catch up, and even now it's only caught up part of the way." Ginger and digestion: what "helps support digestion" actually means Ginger carries a permitted botanical claim in the UK and EU — "helps to support digestion" — used at a daily intake of 0.5 to 2g of root ginger.[3] Worth knowing: botanical claims like this one sit in a different regulatory category to vitamin and mineral claims. They're permitted under transitional "on hold" arrangements while the EU's wider review of botanical evidence remains unfinished, rather than fully re-evaluated the way a claim on, say, vitamin D would be. That doesn't mean the claim is baseless — the traditional-use case is genuinely substantial — but it's a different kind of evidence to a modern EFSA-assessed trial. 0.5–2g the daily amount of root ginger behind the UK/EU "helps support digestion" claim That's a fairly wide range in practice — roughly a thumb-sized piece of fresh root at the low end, or a couple of standard 500mg capsules at the top. Most people land somewhere around one cup of properly steeped ginger tea or one to two capsules with food. Where digestive enzymes come in Here's the distinction worth making: ginger's job, per the evidence, is mostly about settling an already-uneasy stomach and gently supporting motility. It isn't formulated to do the enzymatic work of actually breaking food down — that's a separate mechanical process, and it's the one that tends to go quietly wrong after a heavy or rich meal, long after any nausea has passed. That's the gap Digestive Enzymes+ is built for: eight digestive enzymes, live cultures and peppermint oil in one capsule, taken with the meal itself rather than reached for afterwards. The Golden Pick Digestive Enzymes+ 8 enzymes · 1B CFU live cultures · peppermint oil £12.95● IN STOCK Shop Digestive Enzymes+ → Plenty of people reach for both — ginger tea before a meal that worries them, an enzyme capsule with the meal itself. They're solving different problems, not competing for the same job. Who should be cautious Taking warfarin or other blood thinners — ginger has mild anti-platelet effects, and case reports and longer-term data both flag a possible interaction; this is a genuine "ask your pharmacist first" situation, not a formality.[4] Scheduled for surgery — the same blood-thinning property means it's usually sensible to stop ginger supplements in the run-up, on your surgical team's advice. Pregnant — check with your midwife or pharmacist before supplementing, even though food-amount ginger (tea, biscuits) is generally considered fine. Prone to gallstones — ginger can increase bile production, so it's worth a word with your GP if this applies to you. None of this makes ginger risky for most people in ordinary food amounts. It just means the leap from "kitchen spice" to "daily supplement at the top of the dose range" is exactly where it's worth a second thought. The honest summary Ginger earns its reputation for nausea, particularly in pregnancy, more shakily for motion sickness and post-surgery queasiness, and thinly for chemotherapy. Its digestion claim is real but sits on older, traditional-use evidence rather than a fresh trial. None of that makes it a gold-standard cure-all — it makes it a genuinely useful, well-worn tool that does one job reasonably well and shouldn't be asked to do the others. Frequently asked questions How long does ginger take to work for nausea? Most people notice an effect within 30 to 60 minutes of ginger tea or a capsule, though in the pregnancy trials it was typically taken for several days running rather than as a single one-off dose, which may be closer to how it's meant to be used. Can you take ginger every day? Within the 0.5–2g daily range, most people tolerate ginger well as a regular habit — it's essentially a concentrated food. Doses above that can bring on heartburn or mouth irritation in some people, and there isn't strong long-term data on high daily doses used for months on end. Is ginger safe to take during pregnancy? Food-level ginger (tea, biscuits, cooking) is generally considered fine, and NHS guidance notes some evidence for its use with morning sickness. Supplement-strength doses are a different question — speak to your midwife, GP or pharmacist before starting, given ginger's mild blood-thinning effect. What's the difference between ginger and digestive enzymes? Ginger's evidence is mostly about calming an unsettled stomach and gently supporting motility. Digestive enzymes do a different, more mechanical job — breaking down the proteins, fats and carbohydrates in a meal so they're absorbed properly. If you want the fuller picture on enzymes specifically, our Digestive Enzymes Explained article goes through who actually needs them. Sources NHS — Vomiting and morning sickness, including guidance on ginger in pregnancy. https://www.nhs.uk/pregnancy/common-symptoms/vomiting-and-morning-sickness/ Nutrition Journal — Systematic review and meta-analysis of the effect and safety of ginger in the treatment of pregnancy-associated nausea and vomiting. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3995184/ ClaimSafe — Ginger (Zingiber officinale) UK & EU health claims register, including the "helps support digestion" botanical claim and its 0.5–2g/day condition of use. https://www.getclaimsafe.com/formulation/ginger Drugs.com — Ginger and Warfarin drug interaction summary. https://www.drugs.com/drug-interactions/ginger-with-warfarin-1173-0-2311-0.html At Oxford Origins, your wellbeing is our priority, and although we pride ourselves on our expertise in nutrition and supplementation, it's important to acknowledge the individuality of each person. Articles published by Oxford Origins are not intended to treat, diagnose, cure or prevent any disease, or replace the advice of your GP. We always recommend consulting with a healthcare provider if you encounter any health concerns, and we'll always be here to support you so you're never alone on your journey.

Selenium keeps your thyroid running, but UK soil doesn't hand you much of it. Here's who's actually short, how much you need, and what the evidence on Hashimoto's really shows.

Ashwagandha has become the ingredient everyone name-drops the moment stress comes up — in gym forums, in group chats, on wellness TikTok, usually paired with some version of the claim that it “lowers cortisol.” That much isn’t invented. But the story behind it is narrower than the headlines suggest, and if you like knowing what a study actually found before you start taking something daily, this is worth five minutes. What Cortisol Does — and Why Ashwagandha Gets Linked to It Cortisol is your main stress hormone, released by your adrenal glands whenever your brain flags something as urgent — a deadline, an argument, actual danger. In short bursts, it’s useful: it sharpens focus and mobilises energy. The problem is chronic elevation, cortisol that stays high because life stays demanding, which tracks with poor sleep, low mood, and wider strain on the body over time. Ashwagandha (Withania somnifera) is classed as an adaptogen — a category of plants used in Ayurvedic medicine for centuries on the idea that they help the body regulate its stress response rather than sedate it outright. A 2025 systematic review and meta-analysis in BJPsych Open pooled the available randomised controlled trials and found a significant effect of ashwagandha on cortisol levels compared with placebo, alongside reductions in perceived stress and anxiety scores.[1] Significant here means the effect is real and unlikely to be down to chance. It doesn’t mean dramatic, and it doesn’t mean identical for everyone who takes it. “The premise behind adaptogens isn’t sedation. It’s regulation — helping the body’s stress response come back down once the immediate need for it has passed.” The Study Behind the Number You’ve Probably Seen Most of the specific percentages floating around online trace back to one trial: a 2012 double-blind, placebo-controlled study of 64 adults with a history of chronic stress, published in the Indian Journal of Psychological Medicine. Participants took 300mg of a high-concentration, full-spectrum ashwagandha root extract twice a day for 60 days. By the end, the treatment group’s serum cortisol had dropped 27.9% relative to placebo, alongside improvements across several stress and anxiety scales.[2] That extract is now sold under the brand name KSM-66, one of the most-studied standardised ashwagandha extracts on the market. Worth being precise about what this does and doesn’t prove: it was one trial, one dose, one specific extract, in adults who were already chronically stressed. It’s not a guarantee of what happens with a different formulation, a different dose, or someone who isn’t especially stressed to start with. 27.9% The drop in serum cortisol seen in a 60-day trial of ashwagandha root extract, versus placebo If you’re going to try it, the extract and the dose matter more than most labels let on. Our Ashwagandha KSM-66 uses that same standardised, full-spectrum 12:1 root extract at 1281mg per capsule, boosted with black pepper extract (95% piperine) for absorption — one capsule, once a day, rather than a vague scoop of powder. The Golden Pick Ashwagandha KSM-66 1281mg KSM-66 extract · piperine boosted £12.95● OUT OF STOCK View Ashwagandha KSM-66 → The UK Safety Review Most Ashwagandha Content Skips Here’s the part most ashwagandha content leaves out. In 2024, the UK Food Standards Agency opened a call for evidence on ashwagandha specifically, citing “potential risks to health from consuming ashwagandha in food supplements” — flagging case reports linking it to effects on thyroid hormone levels and, less commonly, liver toxicity.[3] The FSA’s own toxicology committee described the liver cases as consistent with an idiosyncratic reaction: rare, and not predictable from dose alone. Denmark restricted ashwagandha in food supplements back in 2020 on similar grounds, and the UK still hasn’t settled on formal usage limits — the review is genuinely ongoing. It’s also worth being straight that there’s no EFSA-authorised health claim for ashwagandha to point to here. The EU’s assessment of botanical health claims has been on hold since 2010, so nothing in this space carries that particular stamp — what exists is evidence from individual clinical trials, which is real, but narrower.[4] We’ve covered the fuller regulatory picture in Is Ashwagandha Legal in the UK: Regulations and Availability, if you want the detail. If you’re pregnant, breastfeeding, on thyroid medication, or managing a liver condition, this is a genuine talk-to-your-GP-first situation, not a personal judgement call. Taking It Sensibly Give it time — most trials run 8 to 12 weeks before measuring results, so four days won’t tell you much. Match the studied dose range — most positive trials sit between 250mg and 600mg a day of standardised extract, not a rough guess at a powder serving. Take it daily, not as a rescue remedy — the effect builds through consistent use rather than showing up after one dose. Check with your GP first if thyroid medication, pregnancy, or liver health are part of your picture. Ashwagandha’s popularity has outpaced the caution around it, which tends to happen with anything that goes from ancient remedy to Instagram shorthand in a few years. The cortisol research is real and worth taking seriously. It’s also tied to specific extracts, specific doses, and people who were properly stressed to begin with — not a blanket promise. Read the label, give it the weeks it needs, and don’t skip the GP conversation if your history calls for it. That’s the standard worth holding it to. Frequently asked questions How long does ashwagandha take to work for stress? Most clinical trials measure change at the 8 to 12 week mark, though some people report feeling a bit calmer within 2 to 4 weeks. Give it the full 8 weeks at a consistent dose before deciding whether it’s doing anything for you. Can you take ashwagandha every day, long-term? Most of the published trials run for 8 to 12 weeks continuously, and that’s the window the safety data actually covers well. Longer-term daily use hasn’t been studied as thoroughly, which is part of why UK regulators are still reviewing it. If you want to use it beyond a few months, cycling off periodically and checking in with your GP is the sensible approach, especially if you’re on other medication. What’s the best time of day to take ashwagandha? There’s no strict rule. Some people take it in the evening, since early research points to a mild calming effect; others take it with breakfast alongside other supplements, purely for consistency. We’ve gone into more detail on timing in When Is the Best Time to Take Ashwagandha for Optimal Benefits. Is ashwagandha the same as other adaptogens like rhodiola or ginseng? No. They’re grouped together as adaptogens because they’re all believed to help the body manage stress, but they’re different plants with different evidence bases and different safety profiles. Ashwagandha currently has the largest body of clinical research behind it for cortisol specifically, while rhodiola’s research leans more toward fatigue and mental performance. They’re not interchangeable, and combining several without guidance isn’t something we’d recommend. Sources BJPsych Open — systematic review and meta-analysis of ashwagandha supplementation on cortisol, stress and anxiety in adults, cited for the pooled effect on cortisol levels. cambridge.org Chandrasekhar K, Kapoor J, Anishetty S (2012), Indian Journal of Psychological Medicine — the randomised, placebo-controlled trial cited for the 27.9% serum cortisol reduction figure. journals.sagepub.com Nutrition Insight, reporting on the UK Food Standards Agency’s 2024 call for evidence on ashwagandha safety, cited for the FSA’s thyroid/liver toxicity concerns and the Danish restriction. nutritioninsight.com Nutrition Insight, on the EU’s botanical health claims assessment process, cited for the absence of an EFSA-authorised health claim for ashwagandha. nutritioninsight.com At Oxford Origins, your wellbeing is our priority, and although we pride ourselves on our expertise in nutrition and supplementation, it's important to acknowledge the individuality of each person. Articles published by Oxford Origins are not intended to treat, diagnose, cure or prevent any disease, or replace the advice of your GP. We always recommend consulting with a healthcare provider if you encounter any health concerns, and we'll always be here to support you so you're never alone on your journey.

Ashwagandha can measurably lower cortisol, and real trials back that. But UK regulators are reviewing its safety too. Here's what actually holds up.

Vitamin B12 deficiency is common in vegans and vegetarians because the body doesn't absorb it easily. Here's how much you actually need, and why.