Is there any scientific or nutritional reasoning behind including protein with every meal? How bout just a hearty dark green leafy salad with avocado or something?
FWIW, I'm a 22 year old male, 5 foot 10 and 118 lbs. For my whole life, gaining weight has been virtually impossible no matter how much/how often i eat. My only sources of protein these days are fish and chicken liver. I would like to gain weight, but it's not necessary/I've given up on that prospect.
EDIT: The reason behind me not consuming other sources of protein has to do with my rheumatoid arthritis. All other sources of protein make me flare up badly in my joints. So please don't suggest I add other things to my diet. I just want to know if I'm better off eating protein all day with every meal, or just often but not always.