check out this article:
"Dietary supplementation with a combination of α-lipoic acid, acetyl-l-carnitine, glycerophosphocoline, docosahexaenoic acid, and phosphatidylserine reduces oxidative damage to murine brain and improves cognitive performance", Suchy et al. http://www.nrjournal.com/article/S0271-5317(08)00255-8/abstract