Question: what ingredients are bad in protein powder?
Answer: Casein + WPC. These are also known as whey protein concentrate and caseinate. ... 
Gluten. ... 
Dextrins/Maltodextrin. ... 
Artificial sweeteners. ... 
Skim milk powders/milk solids. ... 
Soy protein. ... 
Vegetable oils and fats. ... 
Thickeners and gums.