Native to North America, black cohosh is a tall, upright plant that grows predominantly at high altitudes. The medicinal part of the plant is the root, which is gnarled and black, giving the herb its name. Sold as a supplement, black cohosh is a popular herbal remedy for treating the symptoms of menopause, but the Food and Drug Administration does not oversee the cultivation or the production of the herb, so safety and effectiveness are not guaranteed. See your doctor for advice before treating any medical condition with black cohosh.
Function
Black cohosh, or Cimicifuga racemosa, contains triterpine glycosides, which may help to regulate a woman’s fluctuating hormones during menopause, according to the PDR for Herbal Medicines. Triterpine may inhibit the body’s production of excess estrogen. Clinical studies confirming the effectiveness of black cohosh are limited and more studies are necessary.
Benefits
For women who want a natural alternative to conventional Hormone Replacement Therapy, black cohosh may provide relief without the dangerous side effects associate with HRT. The Mayo Clinic reports that black cohosh may be beneficial in treating menopausal symptoms, but your physician should monitor the use of this herbal remedy.
Studies
Limited studies of the effectiveness of black cohosh offer mixed results. The 2006, the HALT, or Herbal Alternatives for Menopause Trial, concluded that black cohosh was no more effective than a placebo. Alternately, another 2006 study at the University of Pennsylvania reported that black cohosh may be beneficial in reducing menopausal symptoms. Contact your doctor before using black cohosh.
Dosage
Black cohosh is available in tablets, capsules, extracts and as an herbal tea. James Balch, M.D., author of “Prescription for Natural Cures,” suggests taking 80mg of black cohosh twice a day. Do not take this herb if you are already taking other medications to control menopausal symptoms, unless directed to do so by your doctor.
Side Effects
While side effects are rare, Drugs.com reports that large doses of black cohosh may result in nausea, visual disturbances, increased heart rate, dizziness and sweating. Stomach upset may also occur. If you experience side effects after using black cohosh, discontinue use of the herbal remedy and call your doctor.
References
- Mayo Clinic: Black Cohosh
- Drugs.com: Black Cohosh
- Eureka Alert: HALT Study: Black cohosh no better than placebo for hot flashes.
- Wiley Interscience: A retrospective case-control study of the use of hormone-related supplements.
- “PDR for Herbal Medicines, 2nd Edition”; Joerg Gruenwald, PhD, 2000



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