Chrysin is a natural bioflavonoid that has shown remarkable activity in suppressing the enzyme aromatase, which is responsible inter alia for the conversion of testosterone into estrogen (several studies). In elderly men, testosterone levels decline progressively with age while estrogen levels rise to unphysiological levels. This happens because, with advancing age, the aromatase activity increases. Low testosterone levels (with high estrogen levels) are a recognised risk factor for several diseases associated with elderly men including risk for heart disease. For this reason, controlling aromatase levels is highly desirable in elderly men. Several studies (see for example Steroid Biochemical Molecular Biology-1993) have shown chrysin to be a highly effective natural controller of aromatase activity in elderly men.