Eating easy to digest food!

I get very weak indeed without animal protein and fats in my diet.
The worst things for me are fibrous foods, wholegrain and sulfurous veges.
Eating certain foods doesn't add to my fatigue but then again I'm not sure that the word fatigue covers my symptoms anyway. Mine are mainly viral and infections.
same for me when I do not get enough protein. I eat eggs, butters and milk and cheese and the occasional yogurt to get my protein.
not for everyone, but I feel a bit more fatigue with meat.
fish seems okay for me.