Does the herbal product black cohosh alleviate hot flashes in menopausal women?

No, unfortunately for millions of women seeking alternatives to hormone replacement therapy.

In a study published in December in the Annals of Internal Medicine, researchers from Washington state concluded that black cohosh does not work for menopausal symptoms such as hot flashes. The only thing that did, as has been shown repeatedly, was estrogen, either alone or with another hormone called progestin.