Originally Posted by Carbonfiberboy

120g of protein is plenty. Probably more than enough. What you want to use in those calculations is not your current weight, but rather your desired weight.

For the fatigue and depression problems, I suggest riding much harder, hard and long enough so that you get high from it. Unfortunately, one has to get fairly fit before this is possible. Your body will make the drugs you need, all by itself, but it needs some help from you to do it. It's always a problem with reinforcement: we do the things for which we get positive reinforcement. But it's hard to get that cycle started. Once you get it going, it will run by itself though. Rock on.