Black Cohosh Study | National Institute of Environmental Health Sciences
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Black Cohosh Study
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Study Background
This study is no longer accepting participants.
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Black Cohosh is an herbal supplement taken by some women to treat hot flashes, cramps, or other symptoms.
Researchers are studying the health effects of black cohosh in women who have been taking the supplement for at least 3 months.
Researchers are investigating how black cohosh affects folate and B12 levels, anemia, chromosomal damage in red blood cells, and metabolomics profiles.
Eligibility Criteria
Ages Eligible for Study: 18 years and older
Sexes Eligible for Study: All
Accepts Healthy Volunteers: Yes
All participants must be non-pregnant. No children, cognitively impaired persons, or prisoners will be enrolled.
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Last Reviewed: December 30, 2025