It's reasonably expensive and difficult to have too much protein powder. However, it is possible to take more protein than your body needs and this can have some negative impacts. Protein contains 4 calories per gram and excessive calories can cause weight gain. In general, we would not advise more than a maximum of 2grams of protein per pound of body weight in a day.
As a rough guide, we recommend the following:
Minimal Activity - 0.5 grams of protein per pound of body weight
Moderate Activity - 0.7 grams of protein per pound of body weight
Intense Activity - 1 gram of protein per pound of body weight
Also, keep in mind that the body can only digest and absorb around 25grams of protein over the 3-hour digestion period after consuming it. We recommend taking protein powder serves as directed. Most products provide around 30grams of protein in a serving. There are some exceptions that provide well in excess of 30grams of protein per serve. We would suggest using less than directed in this case as your body will not absorb the excess.