In this study on zinc and hormones, it was found that the addition of zinc to the diet of zinc -
deficient elderly men, who were otherwise normal, resulted in a statistically significant increase in serum testosterone levels over the course of six months.
«Omega - 3 fatty acids and Parkinson's disease (PD): A number of animal studies have shown that DHA has preventive and / or therapeutic effects against PD.20 - 22 I have seen PD in a surprising number of
elderly men that eat healthy vegan diets, and I have also observed that all these
men were DHA -
deficient.