Just like having too little protein in your diet can lead to serious health problems, eating too much protein for a long time can cause exhaustion and discomfort, including indigestion, dehydration, nausea, irritability, diarrhea, headaches, and put you at an increased risk for developing kidney stones. Knowing the answer to ‘How much protein do I need” can help you avoid eating too much protein, and subsequently suffering from discomfort or medical problems.