Standardized Black Cohosh Extract 2.5 by Planetary Herbals 45 Tablet Black Cohosh Extract 2.5 Standardized 80 mg Black cohosh ( Cimicifuga racemosa ) has traditionally been one of the most important herbs for women. Modern research has focused on its ability to support women through menopause. Planetary Herbals Standardized Black Cohosh Extract 2.5 contains a broad spectrum of the valuable triterpene glycosides considered to be responsible for black cohosh's action.