CAN YOU OVERDOSE ON PROTEIN?
The short answer is, yes, however it is HIGHLY unlikely.
The real answer is most Americans are not getting enough protein in their diet. Not getting enough protein in your diet can cause some or all of the following problems:
Your protein requirements, in grams, are based on your level of physical activity and your body weight in pounds. If you are an inactive sedentary adult, your protein requirement, in grams, is 0.4 times your body weight. So a 150-lb. sedentary adult would need about 60g of protein per day. If you are an active adult trying to maintain your current weight, your protein requirement, in grams, is 0.4 to 0.6 times your body weight. If you are an athlete or adult trying to add lean muscle mass, your protein requirements, in grams, is 0.6 to 0.9 times your body weight. For example, if you are a 175 lb. adult male who engages in moderate amounts of physical activity but are not trying to add any muscle mass to your frame, you will require 70 to 105g of protein a day.
If you stay within your recommended dosage, you can not overdose on protein unless if you have kidney or liver failure. If anything, there is more damage done by not having protein then having too much.