Black Cohosh
Useful mainly for menopausal women wanting a non-hormonal option, accepting that benefit is uncertain.
Quick decision guide
May help most
Menopausal women wanting a non-hormonal option, accepting that benefit is uncertain
Common dosing range
~40 mg/day root/rhizome extract (median across trials)
When to expect effects
Weeks to a few months
Watch out for
Rare reports of liver injury; avoid with liver disease
What is it
Black cohosh (Actaea racemosa, formerly Cimicifuga racemosa) is a perennial plant from the buttercup family native to North America. Its roots and rhizomes have been used historically by Native Americans for musculoskeletal pain, fever, and women's reproductive health, and today it is most commonly marketed for menopausal symptoms.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
menopausal hot flashes and night sweats Mixed Evidence | Inconsistent; often no better than placebo | Menopausal women seeking a non-hormonal trial option | Weeks to a few months |
other menopausal symptoms (sleep, mood) Mixed Evidence | Unclear | Menopausal women already trialing it for hot flashes | Weeks to a few months |
menopausal hot flashes and night sweats
- Effect
- Inconsistent; often no better than placebo
- Best fit
- Menopausal women seeking a non-hormonal trial option
- Time
- Weeks to a few months
other menopausal symptoms (sleep, mood)
- Effect
- Unclear
- Best fit
- Menopausal women already trialing it for hot flashes
- Time
- Weeks to a few months
Evidence for 2 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
menopausal hot flashes and night sweats
Supplement benefitTrials of black cohosh for hot flashes and night sweats are inconsistent, with many well-conducted studies showing no benefit over placebo. The North American Menopause Society advises against recommending it because it is unlikely to help vasomotor symptoms. A minority of trials and some users report relief, so a short personal trial is reasonable but not evidence-backed.
Bottom line: Evidence is conflicting and leans negative; do not expect reliable hot-flash relief.
Evidence is mixed
Some randomized trials report symptom relief while many others, and major menopause guidelines, find no benefit over placebo. Heterogeneous preparations and outcome measures make the literature hard to reconcile.
other menopausal symptoms (sleep, mood)
Supplement benefitSome trials assess effects on menopause-related sleep, mood, and vaginal symptoms, but results are mixed and often secondary outcomes within hot-flash studies. No consistent benefit on these endpoints has been established.
Bottom line: Benefit for sleep, mood, or vaginal symptoms in menopause is unproven.
Evidence is mixed
Mixed secondary-outcome data across trials with no consistent signal.
How it works
How to take it
What to track
4 commercial forms
Compare the main delivery options and what they’re best suited for.
Standardized root and rhizome extract
Most common form in supplements. Standardization varies; some products use 2.5% to 5.7% triterpene glycosides.
Often standardized to triterpene glycoside content
Remifemin (proprietary extract)
Commercial product used in many clinical studies. Has been reformulated multiple times.
Standardized to be equivalent to 40 mg root/rhizome per daily dose
Dried root/rhizome powder
Traditional whole-herb form. Composition and potency vary widely between products.
Variable composition
Liquid extract / tincture
Used in traditional preparations. Varies in concentration and standardization.
Alcohol-based extraction
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Rare reports of liver injury (hepatitis, liver failure); causality not established
Who should avoid it
- People with liver disorders
- Pregnant women (except under medical supervision)
- Anyone developing signs of liver trouble while using it
Pregnancy & breastfeeding
Avoid in pregnancy except under healthcare provider supervision, as it has not been rigorously evaluated.
Interactions
Theoretical additive liver risk given case reports of injury
Not systematically studied; discuss with a clinician
Protocols featuring Black Cohosh
Evidence-backed routines where Black Cohosh plays a role.
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
Does black cohosh actually work for hot flashes?⌄
Available evidence is inconsistent. A 2012 Cochrane Review and a 2016 meta-analysis both concluded there is insufficient or no significant evidence that black cohosh reduces hot flashes more than placebo. Major medical organizations including the North American Menopause Society do not recommend it.
Is black cohosh safe for my liver?⌄
Worldwide reports describe at least 83 cases of liver damage associated with black cohosh use, though causation has not been established. Some cases may have involved impurities or incorrect species. People with liver disease should avoid it, and anyone developing symptoms of liver trouble should stop and contact a doctor.
Is black cohosh estrogenic?⌄
Despite common claims, studies on whether black cohosh raises estrogen levels or has direct estrogenic effects are inconsistent. The mechanism remains unclear, and it is not equivalent to estrogen therapy.
Is black cohosh safe in pregnancy?⌄
No. The American Herbal Products Association recommends pregnant women avoid black cohosh except under healthcare provider supervision. Use in pregnancy has not been rigorously evaluated.
How long can I take black cohosh?⌄
Most studies examined short-term use (typically 6 months or less), so long-term safety is not established. Discuss extended use with your healthcare provider, especially given liver injury concerns.
References by claim
Track Black Cohosh with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.