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Peppermint oil has a long reputation for settling the gut. Here is what the IBS trials actually found, what the NHS advises, and where the evidence stops.

Most adults in the UK eat about 20g of fibre a day. The government target is 30g.[1] That gap is why fibre supplements sell, and why two names keep turning up on the shelf: psyllium and inulin.Both are fibre. They are not the same thing, and they don't do the same job. 30g vs ~20g the daily fibre target for UK adults, against what most of us actually eat Two fibres, two very different jobsPsyllium is the husk of Plantago ovata seeds. Stir it into water and it swells into a thick gel. That gel is the whole trick: it holds water in the gut and adds soft bulk. We've covered how that works in more detail in our psyllium husk guide.Inulin is a different animal. It comes from chicory root (and, in smaller amounts, onions, garlic and leeks), and it doesn't bulk anything. Your gut bacteria ferment it. That makes it a prebiotic, a food for the bugs rather than a sponge for water. If the prebiotic idea is new, probiotics vs prebiotics is the place to start.One bulks. One feeds. Which you want depends on what you're actually trying to do.What the constipation research showsIn 2025 the British Dietetic Association published guidelines on managing chronic constipation in adults through diet, built on four systematic reviews covering 75 randomised trials.[2] On the fibre supplement question, the picture was clear. Psyllium softened stools, increased how often people went and reduced straining, with the effects showing up at higher doses and over longer periods. Supplements based on inulin and similar fibres (polydextrose, galacto-oligosaccharides) didn't show the same benefit, and inulin-based ones made flatulence more likely.[2]That's guidance for chronic constipation, not a promise about any one person's gut. But it's a useful steer: if regularity is the goal, psyllium has the stronger track record.So why does inulin have an authorised claim?Fair question, because it does. There's an authorised claim that chicory inulin contributes to normal bowel function by increasing stool frequency, with one condition attached: it needs a daily intake of 12g of native chicory inulin.[3]Both things can be true. That authorisation is about a defined amount of one specific type of inulin, while the BDA looked across fibre supplements as a group. Twelve grams is also a lot to take in one go, so check the label on anything that mentions inulin and see whether an amount is given at all. Plenty don't.Choosing between themReach for psyllium if the aim is softer, more regular stools. Think about inulin if you're more interested in feeding your gut bacteria than in bowel movements, and go slowly, since gas is the usual price of fermentable fibre.Plenty of people want a bit of both, and that's the logic behind our Psyllium Husk Fibre: 4,200mg of psyllium husk fibre, with prebiotic inulin and live cultures alongside it. Psyllium does the bulking, the inulin is there for your gut bacteria, and the cultures go in with them.The Golden Pick Psyllium Husk Fibre 4,200mg psyllium husk · Prebiotic inulin · Live cultures £17.95● IN STOCK Shop Psyllium Husk Fibre →To be straight about it: the trials behind the psyllium findings tended to use higher doses over longer periods, so treat 4,200mg as a steady top-up that sits alongside the fibre you eat, not a full-dose protocol. We also don't list an inulin amount, so we're not claiming the 12g effect for it.Starting without regret Go low first — a sudden jump in any fibre is what causes the gas and bloating, so build up over a couple of weeks. Drink water with it — psyllium needs liquid to do its job, and more with each dose. Keep eating fibre — porridge, beans, lentils, wholemeal bread and vegetables with their skins on all count towards that 30g. Mention it to a pharmacist — if you take regular medication, ask how to space it from a fibre supplement. If constipation is persistent, or comes with blood in your stools or a change in bowel habit that doesn't settle, see your GP rather than self-managing with supplements.Good fibre habits are rarely dramatic. A bowl of porridge, a glass of water, a capsule or two, repeated for weeks. That's the standard worth holding yourself to.Frequently asked questionsIs psyllium or inulin better for constipation?On the current evidence, psyllium. The BDA's 2025 guidelines found psyllium softened stools and increased frequency, while inulin-based supplements didn't show a benefit and made flatulence more likely. Inulin is better thought of as a prebiotic than a bulking fibre.Can you take psyllium and inulin together?They're often combined in one product, and the two work differently, so there's no clash in principle. Start with a low dose, build up slowly and drink plenty of water. If you're curious how prebiotics and live cultures fit together, our guide to probiotics vs prebiotics explains it.How long should you try a fibre supplement before judging it?Longer than a few days. The BDA guidelines suggest starting at a low dose and persisting for at least four weeks before deciding whether it's helping. If nothing has improved, speak to your GP or pharmacist.Why does fibre make me bloated?Gut bacteria ferment some fibres, especially inulin, and gas is a by-product. Increasing too fast makes it worse. Going slowly gives your gut time to adjust, and the BDA review noted inulin-based supplements in particular raised the likelihood of flatulence.Sources NHS — 30g a day fibre target and average UK adult intake of about 20g. https://www.nhs.uk/live-well/eat-well/digestive-health/how-to-get-more-fibre-into-your-diet/ Dimidi E, van der Schoot A, Barrett K, et al. British Dietetic Association guidelines for the dietary management of chronic constipation in adults, Journal of Human Nutrition and Dietetics, 2025 — cited for psyllium and inulin findings and the low-dose, four-week trial suggestion. https://doi.org/10.1111/jhn.70133 (summary: News-Medical) Commission Regulation (EU) 2015/2314 (as retained in UK law) — authorised chicory inulin claim and 12g daily intake condition. https://www.legislation.gov.uk/eur/2015/2314/annex/adopted 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.

Days, weeks or months? What the research says about how long probiotics take to work, why consistency matters, and how to give one a fair trial.

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.