How to choose the best protein powder: A guide from Precision .
WEBIf you choose to use protein powder, 2040 grams of protein per day (usually 12 scoops) from protein powder is a reasonable amount. For most people, 80 grams per day (about 34 scoops) is a good upper limit of supplemental protein intake. This isn't a hard and fast rule, just a general guideline.