This document provides information on whether men need to take various supplements. It recommends that a daily multivitamin is generally sufficient to ensure nutritional needs are met, as long as a healthy, varied diet is consumed. Individual supplements are not necessary and may pose risks, with the exception of fish oil which has heart benefits when recommended intake through diet is not met. The document provides guidance on selecting a multivitamin and indicates most claims of supplements preventing diseases like cancer are not supported by evidence.