6) Zinc (ZMA) . There is one supplement, ZMA, a form of zinc that has one study that shows a boost in testosterone. Although, a follow-up study showed no significant benefit, it seems like that zinc deficient men may get some benefit in testosterone levels, if nothing else from improved sleep. For more information, see my link on Zinc and ZMA . ZMA also has an absorbable form of magnesium, which is worth its weight in gold.