assuming he does not have a history of kidney problems protein shakes can be a part of his diet but not as a substitute for meals (make sure he isn't trying to lose weight to get into a lower weight class). protein shakes will not make him stronger or his muscles bigger in spite of what he hears or reads on the side of the product. excess protein can be a stress on the kidneys so make sure he remains well hydrated and does not exceed the recommended amounts of this product. more is not better.
my son is 16 years old he is in to wrestling is it ok for him to drink protein shakes?