The quality of studies is low for most complementary therapies like black cohosh.
However, a recent meta-analysis of 22 studies showed significant improvement in mood, night sweats and hot flushes with black cohosh vs placebo. 1
It is mentioned as a possible complementary menopause therapy in NICE Guidelines as long as the lack of evidence is acknowledged.2 But this product doesn't have any of the proven supplements like vitamin D so you'll have to get that elsewhere or choose a supplement with black cohosh and vitamin D.
