Soy protein supplements containing isoflavones do not significantly reduce the progression of atherosclerosis (build-up of plaque in the arteries) in postmenopausal women, according to a recent study published in the journal Stroke. However, a subgroup analysis of this study showed that soy supplements may benefit women who had experienced menopause within the last 5 years. Isoflavones are compounds similar to the female hormone estrogen and act like estrogen in some tissues. Previous epidemiological and laboratory research has suggested that isoflavones extracted from soybeans may have cardioprotective effects and may be a safe therapeutic alternative to hormone therapy for postmenopausal women.
Source: http://nccam.nih.gov/research/results/spotlight/110411.htm?nav=rss