I must admit that I've had most success affecting my mood and health level with amino acids. Aceytl L-Carnitine I have taken for about three months and feel a good mental boost. Neuroreplete had a good affect on me too. Now, I am starting L-Serine and trying that out (2000mg p/day) Anyone out there recommend other amino acids that I could try for chronic fatigue and brain function? I'm thinking next of L-Tyrosine. I think in general I have poor absorbtion. My doc has put me on a gut-fixing plan. For example, I have white spots on my nails, zinc deficiency. This is despite taking a zinc supplement every day for a while now (megafood zinc). I feel like I'm not absorbing. I don't have a poor diet either.