I get a stabilizing effect for my slight anxiety from taking alpha lipoic acid in small doses and regularly (at least concentration improves and I can sit down and seriously do some work). Large amounts of vit C (1 g and more per day) makes me anxious and increases salivation, and my heart may start racing (also get enlarged pupils). Same with vit E. Zinc stabilizes my anxiety somewhat. I have heard selenium also causes typically anxiety and heart racing.