there is a pretty wide acceptable range of protein recommended by the institute of medicine from 10-35% of calories. for a 2000 calorie diet that would be 50g to 175g. for the average healthy person high levels of protein in the diet is usually not an issue although there is some evidence that protein intake 2-3 times the recommended amount contributes to urinary calcium loss and could predispose someone to bone loss. people with renal (kidney) problems and diabetics who are at increased risk for such issues should not consume excess protein. the bigger issue is that if protein is high fat and carbohydrate intake also change. a balance of all three macronutrients is important for good health including healthy carbs (45-65% such as fruits vegetables whole grains and bean/legumes and healthy fats (20-35%)such as vegetable oil avocados nuts and seeds. diets that exclude entire food groups are not recommended by health professionals. seeing a registered dietitian can help you get personalized counseling on the right amount of protein for you. for more on protein needs see this helpful webmd article <link>
can you take too much protein (as in protein shakes food vitamins etc? )