I’m not sure if I buy into the idea of nutritional supplements enhancing performance. I think the physiology of performance enhancement deals more with substances that are a little more powerful and made in the body. Obviously, nutrition has an impact on that (watch SuperSize Me). However, I think that it might be too broad of a generalization, for me at least, to say that nutrition supplements or vitamins alone offer a measurably significant boost to performance.
Karin brought up caffeine. Do we consider this a supplement? If we do, then yes, supplements alone can increase performance in moderate amounts. If we don’t and we’re looking solely at vitamins, CoQ10, garlic, milk thistle, acai, major amino acids like l-lysine and l-arginine, maybe a b-complex.. I don’t think we would find too much evidence out there that these would increase performance. L-arginine, maybe would promote blood flow. You get into performance enhancement, I’m thinking testosterone, EPO, and to a lesser extent the stuff you can find at GNC (there are good ones and useless supplements at GNC in my honest opinion), and to an even lesser extent I think of cocaine and certain amphetamines, along with the most recent trend—“research” peptides.
Sport Performance and natural, safe performance enhancement are kind of areas of interest to me. I’m looking forward to seeing what others think about this.