I have just copied and pasted this but it explains alot
Before Victor Conte became a central figure in a steroid scandal, a supplement called
ZMA was the Burlingame sports nutritionist's claim to fame.
Endorsed by Giants star Barry Bonds, former Raiders linebacker Bill Romanowski and other athletes and bodybuilders, it has netted Conte -- by his estimation -- $10 million in the few years it has been seriously marketed by his company, SNAC Systems.
Now, a study by a Baylor University exercise and sports nutritional laboratory says there's not much to ZMA, a finding Conte disputes. The study is being published today.
The Baylor study followed 42 trained athletes who worked out eight weeks. Some were fed a sugar pill and others ``ZMASS,'' which contains the ZMA formula of zinc, magnesium and vitamin B6. ZMASS is made by Cytodyne, a New Jersey supplement company that sponsored the study. No significant differences in muscle mass or testosterone levels were noted in the study, although researchers reported ``some trends'' in that direction and recommended additional research.
``Bottom line, it doesn't do much,'' said Richard Kreider, who heads Baylor's Department of Health, Human Performance and Recreation, which performed the study.