Obesity, constipation, Kidney stones, and Liver issues.
Explanation:
Amoung other things of course, but these are defientely a top 4. An excess amount of anything is obviously bad, but if you're eating too much protien and not using it to build muscle and not burning off those calories in any way it will just add on pounds. Protien is good for you, but only if you use it in the right way.
