we're not saying that if someone eats a hamburger , that they're going to immediately keel over and die like a dog lapping up anti-freeze., The human body will compromise- and take what it can from what we eat and economize and utilize what good it can get from it--even if its not the most ideal form of protein for the human body in the long run.
Didnt someone just post a few hours ago that when they owned a company, they'd eat meat , because it made them more aggressive to compete with corporate competitors? I'd imagine if your going to be in sports, you need that type of aggressiveness as well, so that premise would apply in sports as well as the corporate World. It serves its purpose, but not good for the long run.
If I were your son, later in life, I'd try to get more protein from fresh water trout, beans, lentils, nuts and other protein rich vegatable type foods after he gets older and is out of football.
Excess meat protein (as in the amount of the typical american diet) as well as soft drinks do tend to leach out calcium from our bones. He may want to keep this in mind after his highschool or college years.
He also may want to eat more dark green leafy vegetables- like Kale and raw spinach at that time, because these vegetables are very calcium rich-- and if he gets enough sunshine (or Cod liver oil at least) Dark green veggies will work with vitamin D to really boost his bone mass.
While he's still playing football, maybe he can get his hands on some thoroughly cooked wild deer meat-- as at least it wont contain antibiotics or growth hormones.
P.S., , my boyfriend has lifted weights all his life, but he actually feels better when he has a smaller more proportioned -yet toned muscle mass. Visually, he likes his body all bulked up, but phsycially, he feels much more better when he's lighter.
He got his enlarged heart in his 30's after he started bulking up too much over the years. He is now 41. He says that after you bulk up- you are in pain if you dont keep lifting to keep the muscle mass.
My boyfriend also eats meat when he lifts, and I can always tell because he gets constipated alot and he has digestive issues after he eats.