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Black Cohosh

herbs

Black cohosh is a traditional herbal supplement derived from the root of Cimicifuga racemosa, native to North America. It has been used for centuries to support women's health, particularly during menopause and hormonal transitions. Evidence for its efficacy is mixed, with some studies showing modest benefits for hot flushes.

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Benefits

May reduce frequency and severity of menopausal hot flushes
Supports hormonal balance during menopause
May improve sleep quality and night sweats
Traditionally used for menstrual discomfort
Antioxidant and anti-inflammatory properties

Dosage

Typical Dose

20-40 mg isoflavones daily

Upper Limit

80 mg daily in divided doses

Timing

Consistent daily use; effects may take 4-8 weeks

Forms & Bioavailability

Root extract (standardised)

High

Capsules/tablets

High

Tincture

High

Dried root powder

Moderate

Side Effects

Gastrointestinal upset, including nausea and constipation
Rare hepatotoxicity (liver concerns) reported with prolonged use
Headache and dizziness in some individuals

Interactions

May interact with hormone replacement therapy and hormonal contraceptives
Potential interaction with cytochrome P450 metabolism affecting certain medications
Caution advised with warfarin and other anticoagulants

Research Summary

Multiple clinical trials show modest efficacy for menopausal symptoms, though results are inconsistent across studies. The American College of Obstetricians and Gynaecologists suggests black cohosh may be considered for short-term management of hot flushes. Long-term safety data remains limited, and regulatory status varies internationally; the UK's MHRA permits its sale as a traditional herbal remedy.

The Bottom Line on Black Cohosh

Black Cohosh is moderately researched with promising but sometimes mixed evidence.It is most commonly used for may reduce frequency and severity of menopausal hot flushes and supports hormonal balance during menopause. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.

About Our Research

This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.

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