I don't know if anyone else experiences this, but I get very, very fatigued after I eat a regular sized meal. I have a very fast metabolism, and I am a very skinny 22 year old guy.
When I eat stuff like vegetables, fruits, and meat this doesn't happen so badly - but when I eat a cheeseburger/fries, or biscuits and gravy for breakfast, or anything other than veggies/fruits/meats/nuts, within 15 minutes I will feel so fatigued I almost have to lay down and take a nap. This started happening to me daily about 2 years ago and hasn't gotten any better. I do not consume caffeine or any other stimulants (although I was a horrible caffine addict for most of my 22 years, but I quit totally about 7 or 8 months ago), or take any medications or nootropics. I do go to the gym.
Also, I have a weight gainer supplement called Monster Mass which has a ton of protein, calories, and amino acids. When I take the recommended amount of that, I get extremely fatigued also. I noticed when I eat very very small meals or skip several meals in a row I become more awake and alert. But I'm extremely hungry. (Yes, I have taken stuff to rid myself of parasites, etc., so leave that part out, haha)
Basically, I have somewhat figured out how to overcome the fatigue: don't eat or eat very little. But I don't want to do that because I am trying to gain weight. Maybe I will have to choose one or another.
My question: Does anyone know anything about why this happens, how to remedy/combat it, or am I stuck this way? Also, are there any mild stimulants that can be used to overcome this other than caffeine? I don't want to go back on caffeine because of blood flow issues to the brain. Just doesn't seem healthy. I also notice I have very low impulse control along with this problem. It's almost like I was self-treating myself for ADD my entire life via caffeine.