Is it possible to have too much protein?
Yes, it is possible. The body will utilize the amount of protein it needs for muscle maintenance or building, then move the rest to storage. Make sure to keep track of how much protein you’re taking in so as not to over supplement. Protein should take up one-third of your plate; servings of meat, poultry or fish should be the size and thickness of the palm of your hand.
Sources
Institute of Medicine, Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). 2005, National Academies Press: Washington, DC.
http://www.hsph.harvard.edu/nutritionsource/what-should-you-eat/protein/