Can you overdose on Protein Powder?
In general the answer is no, but your body is not designed to take too much of anything. Long term overuse of protein can have health effects. Excessive protein intake can cause constipation or even diarrhea if combined with a lack of fiber. It can also cause weight gain if its consumption exceeds your calorie needs. It can also lead to dehydration as has been shown in studies. For pre-existing disorders it can also cause further problems with kidney and liver function.
We recommend that you not have more than 2grams of protein (per pound of body weight) per day. For example, a 160 pound person should not have more than 320 grams of protein per day.