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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.

Ashwagandha turns up in most stress-relief conversations now, and for once there's real trial data behind it — not just centuries of Ayurvedic tradition. The question is what that data actually says, because “lowers cortisol” and “makes you feel less stressed” turn out to be two different claims. And right now, the UK's food safety regulator has ashwagandha under active review. Here's what the research actually supports, what it doesn't, and what to check before you buy anything. What ashwagandha is actually being asked to do Ashwagandha (Withania somnifera) is a root used in Ayurvedic medicine for centuries, generally as a tonic for resilience under strain — what modern researchers call an “adaptogen.” The narrower claim being tested in labs today is whether it lowers cortisol, the hormone your adrenal glands release when your body registers a threat, whether that threat is a work deadline or an actual emergency. Chronically elevated cortisol is linked to poor sleep and low mood, among other things, so a supplement that turns the dial down is an obvious thing to want to work. The cortisol evidence, specifically The most-cited single trial here is a 2012 study out of Asha Hospital in Hyderabad: 64 adults with self-reported chronic stress took either 300mg of KSM-66 ashwagandha extract twice a day, or a placebo, for 60 days.[1] The ashwagandha group's serum cortisol dropped 27.9%, against a 7.9% drop in the placebo group — a meaningful gap for a two-month trial. 27.9% Average drop in serum cortisol after 60 days of KSM-66 ashwagandha, vs. 7.9% on placebo That's one trial, though, and supplement research doesn't always replicate outside the original lab. The stronger evidence is a 2025 systematic review pooling eight randomised controlled trials across 488 adults, which found a statistically significant average cortisol reduction compared with placebo.[2] Across different doses and extract types, cortisol genuinely does come down. Why “lower cortisol” isn't the same as “feel less stressed” Here's the part most ashwagandha content skips. That same 2025 review found no significant improvement on the Perceived Stress Scale — the standard questionnaire researchers use to measure how stressed people say they feel.[2] Cortisol fell. Reported stress, in the same participants, largely didn't move. Maybe eight weeks isn't long enough for a hormonal shift to show up in how someone feels day to day. Maybe cortisol just isn't the right lever for subjective stress in the first place. Either read is honest. Neither one is the confident “ashwagandha crushes stress” framing you'll see on most supplement sites. What UK regulators are actually looking at right now This is the part worth knowing before you buy anything. The UK's Food Standards Agency ran a formal call for evidence on ashwagandha's safety in 2024 and is still working through what it means for future guidance, after risk assessments flagged possible effects on thyroid hormones, liver function and blood sugar at some doses.[3] Denmark has already restricted ashwagandha in food supplements over similar concerns, and other EU food safety bodies are watching closely. None of this means ashwagandha is dangerous for most healthy adults at typical doses — the concerns centre on specific groups, not a blanket problem.[4] But it does mean skipping it in pregnancy or while breastfeeding, and talking to a doctor first if you have a thyroid condition, liver disease, or take thyroid, blood sugar or blood pressure medication. We've gone into the regulatory detail properly in a separate piece on where ashwagandha actually stands in UK law — worth a read if this is new information to you. It's also worth knowing that ashwagandha has no authorised EFSA health claim, in either direction — inconsistent extracts and unclear mechanisms have kept it off the approved list for years.[5] That's not the same as “unsafe.” It just means nobody gets to print a guaranteed-benefit claim on the box, including us. If you're going to take it, what actually matters Assuming none of the above rules you out, the studies that showed results used specific things: a standardised KSM-66 extract, roughly 600mg a day, taken consistently for eight weeks or longer.[1] Loose ashwagandha powder from an unlabelled source, taken occasionally, isn't the same product the trials tested. The extract type — KSM-66 and Sensoril are the two most-studied standardised extracts; generic “ashwagandha root powder” with no extraction ratio listed is a different, less-tested product. The dose — most trial doses land around 600mg a day; considerably less than that is unlikely to match the results in the studies. Absorption support — black pepper extract (piperine) is commonly added because it measurably improves uptake of the active compounds. Third-party testing — a UK-manufactured product tested by an independent lab is a reasonable minimum bar for a herbal extract under this much regulatory scrutiny. Oxford Origins' Ashwagandha KSM-66 uses that same standardised extract — a 12:1 full-spectrum KSM-66 formula, the same branded ingredient behind the Chandrasekhar trial — in a single 1281mg capsule, boosted with 95% piperine black pepper extract for absorption, and manufactured in the UK to BRC Grade AA standards. KSM-66 is, as the name on the label suggests, widely considered the gold standard of ashwagandha extract; it's the ingredient most of the research above is actually about, even if no single capsule can promise you the exact numbers from a 64-person trial. The Golden Pick Ashwagandha KSM-66 KSM-66 12:1 extract · 1281mg · black pepper £12.95● OUT OF STOCK View Ashwagandha KSM-66 → It's currently out of stock while we restock — you can still view the full label on the product page and switch on a back-in-stock notification. The honest summary The evidence for ashwagandha and cortisol is genuinely better than most adaptogen claims you'll come across. It's just narrower than the marketing suggests. Cortisol comes down, trial after trial. Whether that translates into feeling calmer is still an open question, and whether it's right for you depends more on your health history than most supplements on the shelf. That's not a reason to write it off. It's a reason to check the label, check your own situation, and not expect a miracle in a capsule. Frequently asked questions How long does ashwagandha take to lower cortisol? Most trials measure cortisol at eight weeks, including the most-cited KSM-66 study, so give it that long before judging results. Some people notice sleep or mood changes sooner, but the cortisol data specifically comes from eight-week-plus trials, not days. For general dosing and timing guidance, see our piece on the best time to take ashwagandha. Can you take ashwagandha every day, long-term? Most published trials run 8–12 weeks, so that's the timeframe with actual safety data behind it. Long-term daily use hasn't been studied as thoroughly, which is part of why UK regulators are still reviewing it. If you want to take it long-term, it's worth cycling off periodically and checking in with a GP, especially if you're on any regular medication. Is ashwagandha safe to take in the UK right now? It's legal and widely sold, but the Food Standards Agency has an active safety review open, and it isn't recommended in pregnancy, while breastfeeding, or for people with thyroid or liver conditions without medical advice. We've covered the full regulatory picture in this article. What's the difference between KSM-66 and other ashwagandha extracts? KSM-66 is a specific, patented 12:1 full-spectrum root extract, standardised to contain the full range of naturally occurring compounds rather than an isolated fraction. It's the extract used in most of the cortisol trials, including the 2012 Chandrasekhar study. Other products use different extraction methods, like Sensoril (leaf-and-root based), or unstandardised powder, which makes it harder to compare results between products. Sources Chandrasekhar K, Kapoor J, Anishetty S (2012), Indian Journal of Psychological Medicine — randomised controlled trial of KSM-66 ashwagandha root extract on serum cortisol and stress in adults. https://pubmed.ncbi.nlm.nih.gov/23439798/ Albalawi AA et al. (2025), systematic review and meta-analysis of 8 RCTs (488 adults) on ashwagandha, cortisol and perceived stress. https://journals.sagepub.com/doi/abs/10.1177/02601060251363647 UK Food Standards Agency — call for evidence and summary of responses on the safety of ashwagandha food supplements. https://www.gov.uk/government/consultations/summary-of-responses-to-call-for-evidence-on-ashwagandha/summary-of-responses-to-call-for-evidence-on-ashwagandha Patient.info — ashwagandha safety, contraindications and drug interactions overview. https://patient.info/features/diet-and-nutrition/ashwagandha NutraIngredients — overview of EU health claim law and the absence of an authorised EFSA claim for ashwagandha. https://www.nutraingredients.com/Article/2025/10/23/breaking-down-the-eu-law-on-mind-health-supplements/ 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.

Folic acid isn't just a pregnancy vitamin. Here's the UK reference intake, who needs more, and one real safety caution worth knowing.

Chromium carries an EFSA-authorised blood sugar claim — but the trial evidence behind it is more contested than the claim itself lets on.