Do supplements help perimenopause? What the research says

Do supplements help perimenopause symptoms? What research says about black cohosh, soy, magnesium, melatonin, ashwagandha and more, and how to choose safely.

By The Change Champions team · Updated 2026-10-01

Part of our guide: Perimenopause treatment: HRT and other options

The supplement aisle has a whole shelf aimed at women your age. Bottles promise calmer moods, cooler nights and better sleep, often with a flower on the label. A friend swears by one thing, social media by another. If you're wondering whether supplements help perimenopause symptoms, or whether you're mostly paying for hope, it's a fair question to ask.

This article looks at what research says about the supplements most often marketed for perimenopause, what's known about their safety, and how to choose more carefully if you decide to try one. It doesn't recommend products or doses.

The short answer: for most supplements, the evidence is weak or mixed. Black cohosh and soy isoflavones have been studied the most, with inconsistent results, and The Menopause Society doesn't recommend herbal supplements or soy for hot flashes. Vitamin D and calcium matter for bone health rather than symptoms. Because the FDA doesn't approve supplements before they're sold, it's worth checking with your doctor or pharmacist first.

How supplements are regulated in the US

Supplements aren't regulated like medicines. The FDA isn't authorized to review dietary supplements for safety or effectiveness before they're sold. Manufacturers are responsible for making sure their products are safe and correctly labeled, and the FDA can remove a product from the market if it finds it unsafe.

This has real effects. The National Center for Complementary and Integrative Health (NCCIH) reports that some black cohosh products have been found to contain the wrong herb, and a 2017 study found that the amount of melatonin in many products didn't match the label.

Natural doesn't always mean safe, either. The NIH Office of Dietary Supplements points out that some plant products can cause serious harm, including liver damage.

Supplements for perimenopause symptoms: what the research says

Here's what US health agencies say about the supplements you're most likely to see.

Black cohosh. This is one of the most studied herbs for menopause symptoms, and the evidence is mixed. NCCIH says a 2023 analysis found black cohosh products potentially beneficial for overall menopause symptoms, including hot flashes, but not for anxiety or depressive symptoms. It's generally well tolerated in studies of up to a year. However, cases of liver damage, some very serious, have been reported. It's uncertain whether black cohosh caused them. Its safety isn't clear for women who've had hormone-sensitive conditions such as breast or uterine cancer.

Soy isoflavones. Soy contains plant compounds called isoflavones. NCCIH says soy isoflavone supplements or soy protein may reduce how often and how severe hot flashes are, but the effect may be small and results haven't been consistent. Soy foods are a normal part of many diets. Concentrated isoflavone extracts have been used safely in studies lasting up to six months, and longer-term safety is less clear.

Magnesium. Magnesium is an essential mineral found in nuts, seeds, beans, whole grains, leafy greens and dairy, and it's often marketed for sleep and mood. There's little good research on magnesium supplements for perimenopause symptoms. The NIH Office of Dietary Supplements notes that high intakes from supplements can cause diarrhea, nausea and cramping, and that magnesium can interfere with some antibiotics and osteoporosis medicines.

Melatonin. Melatonin is sold as a sleep aid. NCCIH says there isn't enough strong evidence to recommend it for long-term insomnia, and American College of Physicians guidelines recommend cognitive behavioral therapy for insomnia (CBT-I) as a first treatment. Short-term use seems to cause only mild side effects, such as headache, dizziness, nausea and sleepiness, but long-term effects are unclear. People with epilepsy or who take blood thinners should only use it under medical supervision. Our guide to perimenopause insomnia covers other approaches.

Vitamin D and calcium. These matter for your bones, not your symptoms. After menopause, the body absorbs and retains less calcium, and bone loss speeds up. Vitamin D helps your body absorb calcium. Supplements aren't right for everyone, and too much of either can cause problems, so ask your doctor whether you need one. Our guide to what to eat during perimenopause covers food sources.

Ashwagandha. This herb, used in traditional Indian medicine, is often sold for stress and sleep. NCCIH says some preparations may help with insomnia and stress, but there isn't enough evidence to know whether it helps menopause. It may be safe for up to three months, but long-term safety is unknown, and there have been rare cases of liver injury. It should be avoided in pregnancy, and it can interact with thyroid, diabetes, blood pressure and sedative medicines, among others.

Evening primrose oil. NCCIH says there isn't enough evidence to show whether evening primrose oil helps menopause symptoms. It's probably safe for most adults, and the most common side effects are stomach pain, nausea and diarrhea.

'Natural' on the label doesn't tell you whether something works, or whether it's safe with your other medicines.

How to choose more carefully if you try one

Tell your doctor and pharmacist. Add every supplement to your medicines list. The NIH Office of Dietary Supplements notes that St. John's wort, for example, makes many medicines less effective, and some supplements can increase bleeding risk or affect anesthesia, so mention them before any surgery.

Look for a third-party seal. Seals from USP, NSF International or ConsumerLab.com show that a product was properly made, contains the ingredients on the label, and doesn't contain harmful levels of contaminants. The NIH Office of Dietary Supplements notes that these seals don't guarantee a product is safe or effective.

Be wary of big promises. Be cautious with any product that claims to work for everyone or to fix your hormones.

Try one thing at a time. That way, you're more likely to notice what's helping, and what might be causing side effects.

Know what has stronger evidence. If symptoms are affecting your life, options with better research behind them include non-hormonal treatments for perimenopause and hormone therapy.

When to talk to a doctor

Talk to your doctor before starting a supplement if you take prescription medicines, are pregnant or could become pregnant, have liver, thyroid or kidney problems, or have had breast or uterine cancer.

Stop the supplement and contact your doctor promptly if you notice signs of possible liver problems, such as yellowing of your skin or eyes, dark urine, pale stools, unusual tiredness, nausea or pain in your upper belly.

If you have thoughts of harming yourself, call or text 988 (the Suicide & Crisis Lifeline). Call 911 in an emergency, such as chest pain, trouble breathing or signs of a severe allergic reaction, like swelling of the face or throat.

Frequently asked questions

What is the best supplement for perimenopause?

There isn't one supplement with strong evidence for perimenopause symptoms. Black cohosh and soy have been studied the most, with mixed results. If symptoms are affecting your life, treatments with stronger evidence, including hormone therapy and FDA-approved non-hormonal medicines, are worth discussing with your doctor.

Is black cohosh safe?

Black cohosh was generally well tolerated in studies lasting up to a year, but cases of liver damage have been reported, and it's uncertain whether black cohosh caused them. Some products have contained the wrong herb. Talk to your doctor first, especially if you have liver problems or have had a hormone-sensitive cancer.

Are supplements approved by the FDA?

No. The FDA doesn't review dietary supplements for safety or effectiveness before they're sold. Manufacturers are responsible for their products, and the FDA can act against unsafe products once they're on the market. A third-party seal can show a product contains what the label says.

Should I take vitamin D and calcium in perimenopause?

Calcium and vitamin D support bone health, which matters more as estrogen falls, but they aren't a treatment for symptoms like hot flashes. Calcium is found in foods such as milk, yogurt, cheese and leafy greens. Your doctor can tell you whether a supplement makes sense for you.

Your next step

Gather every supplement you take, check the labels, and write down the names. Bring the list to your next appointment or ask your pharmacist to check it against your prescriptions.

To see which symptoms are bothering you most, try our symptom check-in. You may also like our weekly email: calm, practical information, once a week.

This article is general information, not personal medical advice. If you have symptoms that worry you, please speak to your doctor.

Tell your doctor and pharmacist about every supplement you take, as some interact with prescription medicines or affect surgery.

Sources

Written by The Change Champions team, an independent educational site. Not reviewed by a clinician. How we write and fact-check.