I want to get bigger is it a good idea to take whey protein, what to do?

Self-image: It seems that “want to get bigger” means having more muscle mass. Whey protein is a source of protein that might improve the nutrient content of the diet and improve muscle mass. High doses can cause decreased appetite, nausea, thirst, bloating, cramps, increased bowel movements , tiredness, and headache. See Physician to discuss other sources of Protein in Diet; and your need to get bigger.