Do cortisol supplements work — and are they safe?

If your cortisol isn't actually high, there's nothing to lower — and most people's isn't. A few supplements (like ashwagandha and magnesium) have some early evidence , but the studies are small and short. Supplements aren't regulated like medicines , so strength and quality vary a lot. Lowering cortisol isn't always good — your body needs it. Check with your GP or pharmacist before starting anything, especially if you take other medicines.

Cortisol isn't a villain. You need it to wake up, handle stress and keep your body steady. So the goal isn't "as little as possible" — it's a healthy rhythm. And here's the catch most adverts skip: for the vast majority of people, cortisol isn't actually too high. If that's you, a supplement to "lower" it has nothing to do — and could even push things the wrong way.

Ashwagandha Some evidence · take care This is the big one online. Small studies have found it may lower morning cortisol a little and ease feelings of stress. The catch: the studies are small and short, products aren't standardised, and there are real safety concerns — it's been linked to liver problems, and in one case to the adrenal glands actually under-working. Some health bodies advise against using it at all until there's better evidence. Not for: pregnancy or breastfeeding, thyroid or autoimmune conditions, before surgery, or alongside other medicines — without GP or pharmacist advice. Magnesium Thin evidence · usually safe A few small studies hint it might nudge cortisol down, especially if you're a bit low in it to start with. It's also genuinely useful for sleep and muscle function. The catch: the cortisol evidence is weak. High doses can cause an upset stomach and diarrhoea. Best to get it from food first — nuts, seeds, leafy greens, wholegrains. Omega-3 (fish oil) Thin evidence · usually safe One or two small studies have suggested a possible effect on cortisol. Omega-3 has other known benefits, but as a cortisol fix the case is thin. L-theanine Thin evidence · usually safe Found in tea, often sold for "calm." It may help you feel relaxed in the moment, but there's little solid proof it changes your cortisol levels in any lasting way. Rhodiola, maca & "adaptogen" blends Thin evidence · check first Marketed heavily as stress-balancers. The evidence is mostly small, mixed studies. "Adaptogen" is a marketing word more than a medical one. If a blend lists a dozen ingredients, it's also harder to know what you're actually taking.

This is the big one online. Small studies have found it may lower morning cortisol a little and ease feelings of stress. The catch: the studies are small and short, products aren't standardised, and there are real safety concerns — it's been linked to liver problems, and in one case to the adrenal glands actually under-working. Some health bodies advise against using it at all until there's better evidence. Not for: pregnancy or breastfeeding, thyroid or autoimmune conditions, before surgery, or alongside other medicines — without GP or pharmacist advice.

A few small studies hint it might nudge cortisol down, especially if you're a bit low in it to start with. It's also genuinely useful for sleep and muscle function. The catch: the cortisol evidence is weak. High doses can cause an upset stomach and diarrhoea. Best to get it from food first — nuts, seeds, leafy greens, wholegrains.

One or two small studies have suggested a possible effect on cortisol. Omega-3 has other known benefits, but as a cortisol fix the case is thin.

Found in tea, often sold for "calm." It may help you feel relaxed in the moment, but there's little solid proof it changes your cortisol levels in any lasting way.

Marketed heavily as stress-balancers. The evidence is mostly small, mixed studies. "Adaptogen" is a marketing word more than a medical one. If a blend lists a dozen ingredients, it's also harder to know what you're actually taking.

Supplements are sold as food, not medicine — so they don't go through the same checks for strength, purity or safety. Two products with the same name can be very different. Please talk to your GP or pharmacist before starting any cortisol supplement if you: are pregnant or breastfeeding have a thyroid, liver or autoimmune condition take any prescribed medicine (including steroids, sedatives or thyroid tablets) have an operation coming up And never stop a medicine your doctor prescribed in order to take a supplement instead.

The boring stuff wins. None of it comes in a bottle: A regular sleep schedule Daylight, especially in the morning Moving your body — without overdoing hard training Eating at regular times to keep blood sugar steady Genuinely winding down — a walk, prayer, breathing, whatever works for you Read more: how to lower cortisol naturally

If you've got symptoms that won't shift — weeks of unexplained weight change, weakness, easy bruising or feeling faint — don't reach for a supplement. See your GP, who can check whether your cortisol is genuinely a problem. Read more: when to worry about your cortisol

Do I need a supplement to lower my cortisol? For most people, no. If your cortisol isn't actually high, there's nothing to lower. Sleep, movement, steady meals and managing stress do far more than any pill — and they're free. Is ashwagandha safe? For many people it's well tolerated short-term, but it isn't risk-free. It's been linked to liver problems and, in one case, to the adrenal glands under-working. Avoid it if you're pregnant or breastfeeding, have a thyroid or autoimmune condition, or take other medicines — and check with your GP or pharmacist first. Can lowering cortisol be a bad thing? Yes. Cortisol isn't the enemy — your body needs it to wake up, handle stress and stay steady. Pushing it too low can leave you feeling worse, not better. What actually lowers cortisol? The unglamorous stuff: regular sleep, daylight, moving your body without overdoing it, eating at regular times, and winding down. No supplement beats these.

What is cortisol? How to lower cortisol naturally The cortisol cocktail: does it work? "Adrenal fatigue" — what the science says When to see your GP about cortisol

⚠ Placeholders — Review Board to confirm NHS / British National Formulary. Information on dietary supplements & medicines safety . [Confirm URL & access date] Society for Endocrinology. Cortisol — You and Your Hormones . [Confirm URL & access date] Lopresti et al. (2019), randomised controlled trial on ashwagandha and cortisol/stress. [Confirm full citation] Case report: reversible adrenal hypofunction associated with ashwagandha. [Confirm full citation] National food-safety body guidance advising caution on ashwagandha. [Confirm body & citation] NIH Office of Dietary Supplements. Magnesium & Omega-3 fact sheets . [Confirm URL & access date]