The older menopause supplements — black cohosh, red clover, evening primrose — have been studied for decades. These four are the current wave, sold hard to women in their forties, and much less examined. Two of them have specific safety issues worth knowing before you start.

Where we stand: Menova is an independent publication. We sell no supplements, we are not your doctor or pharmacist, and this is general education, not medical advice. Our guide to the older ones is what the supplement research says.

Before any of them

Two things apply across the whole category.

Supplements are not verified before sale in most markets. What is in the bottle may not match the label, and dose varies between brands of the same product — see how to tell whether a supplement is worth buying.

Tell your prescriber and your pharmacist what you take. Undisclosed supplements cause real interactions, and three of the four below have interaction potential — see HRT and everything else you take.

Ashwagandha

Sold for: stress, "cortisol", sleep, "adrenal fatigue".

What the evidence looks like. Several small trials suggest a modest effect on perceived stress and sleep quality. The studies are mostly small, short, and heterogeneous in preparation and dose. Nothing establishes it as a treatment for menopausal symptoms specifically.

Two things worth knowing before you start.

Liver injury has been reported in association with ashwagandha — uncommon, but documented well enough that regulators in some countries have issued warnings. Stop and seek advice if you develop nausea, abdominal pain, dark urine, itching or yellowing of the skin or eyes.

It may affect thyroid hormone levels. That matters disproportionately here, because thyroid disease peaks in exactly this age group and is one of the main conditions that imitates the transition. If you take thyroid medication, or your thyroid has not been checked, this is a specific reason to raise it — see perimenopause versus thyroid and HRT and thyroid medication.

The honest alternative. If it is sleep you are buying it for, treat the thing waking you. Night sweats are a treatable medical problem and no supplement outperforms fixing them — see night sweats in perimenopause and menopause insomnia. And "adrenal fatigue" is not a diagnosis — see estrogen dominance, adrenal fatigue and hormone balancing.

Berberine

Sold for: weight, blood sugar, "natural Ozempic".

That last phrase is the problem. Berberine is not a GLP-1 medication, does not work by the same mechanism, and the effect sizes are not in the same category. Marketing it as an over-the-counter equivalent is the clearest example in this space of a claim outrunning its evidence — see semaglutide versus tirzepatide and GLP-1s in perimenopause.

What the evidence looks like. It has been studied for glucose and lipid measures with some positive findings, largely in people with metabolic conditions, in trials of variable quality. It is not established for menopausal symptoms or for weight management in this context.

The safety point that matters. Berberine has meaningful drug-interaction potential — it affects liver enzymes involved in clearing many common medications. If you take anything regularly, this is a pharmacist conversation before you start, not after. It also commonly causes gastrointestinal upset, and it is not appropriate in pregnancy.

The honest alternative. If insulin resistance is the actual concern, it is measurable. Ask for HbA1c — see insulin resistance in menopause and which tests to ask for. If weight is the concern, resistance training and protein do more than any supplement and are the things that protect muscle — see losing weight in midlife.

DIM (diindolylmethane)

Sold for: "estrogen dominance", "estrogen detox", "hormone balance".

What it is. A compound derived from indole-3-carbinol, found in cruciferous vegetables — broccoli, cabbage, sprouts.

What the evidence looks like. Interest comes from laboratory work on estrogen metabolism. There is very little clinical evidence for menopausal symptoms, and the supplement doses are far above what you would get from food.

The bigger issue is the premise. "Estrogen dominance" is not a clinical diagnosis and there is no test that establishes it. What is real underneath the term — relatively unopposed estrogen in anovulatory perimenopausal cycles — has actual clinical responses, and a supplement is not one of them. See estrogen dominance and hormone balancing, progesterone in menopause and heavy periods in perimenopause.

If you have had a hormone-sensitive cancer, or are on tamoxifen or an aromatase inhibitor, do not take anything marketed as altering estrogen metabolism without asking your oncology team — see menopause after breast cancer.

The honest alternative. Eat the vegetables, which are good for you for other well-established reasons — see fibre and menopause.

Inositol

Sold for: insulin resistance, mood, sleep, cycle regularity.

What the evidence looks like. The real research base is in PCOS, where it has been studied for insulin sensitivity and ovulation with some encouraging results. If you have PCOS, that is a legitimate conversation to have — see PCOS and menopause.

Outside PCOS, evidence for menopausal symptoms is limited. Extrapolating from one condition to a different life stage is the weak step, and it is the step the marketing skips.

Safety is comparatively unremarkable at typical doses; gastrointestinal upset is the usual complaint. Which makes it one of the more benign items here — the issue is more that it may do nothing for what you bought it for.

What would be a better use of the money

The uncomfortable comparison, stated plainly.

A month of any of the above costs roughly what a set of blood tests costs in many places — and the tests can find iron deficiency, thyroid disease, B12 deficiency or raised blood sugar, each of which produces exactly the symptoms these products are sold for, and each of which has treatment that works. See our free blood test sheet.

Do not supplement iron without a confirmed deficiency. Iron overload is harmful, and this is the one place where guessing does damage rather than nothing — see how to actually take iron.

If you are going to take one anyway

Which is a legitimate choice, and worth doing properly.

  • One at a time, so you can tell what did anything
  • Decide in advance what would count as working, and by when. "Fewer than six flashes a day within eight weeks" is testable; "feeling better" is not
  • Tell your pharmacist, particularly for ashwagandha and berberine
  • Stop if it has not worked by the date you set
  • Stop before surgery and tell the anaesthetist what you take — see HRT before surgery
  • Keep it on your medication list — see keeping your own health record

What to say

"I'm thinking of trying ashwagandha for sleep and I take thyroid medication — is that a problem? And before I spend money on supplements, could we check ferritin, thyroid, B12, HbA1c and vitamin D?"

That discloses what you are considering, names the specific interaction, and puts the cheap answer first.

Our free 30-day symptom tracker is how you tell whether anything worked, and the free 2-minute Menova self-check organizes your symptom picture — no account, not a diagnosis, and your answers never leave your device.

This article is general education, not medical advice or a diagnosis, and not a recommendation for or against any product. Evidence and regulatory positions change. Do not start, stop or change any supplement or medication based on this page — check with a pharmacist or prescriber who can see your full list.

Sources: NCCIH — Ashwagandha, LiverTox — Herbal and Dietary Supplements, NIH Office of Dietary Supplements — Fact Sheets, and NICE NG23 — Menopause.