Does whey protein cause weight gain?

Whey protein may cause weight gain, as it helps to build muscles, which have a higher density than fat, according to Body Building. Whey protein can help athletes shed fat as it is rich in leucine, which is an amino acid that plays a key role in protein synthesis, and satiates the appetites.

Whey protein comes in three different forms: whey protein concentrate, whey protein isolates and whey protein hydrolysates. Whey protein possesses the highest protein digestibility corrected amino acid score, which measures how effectively a protein is digested, and how effective the protein is in supplying vital amino acids to the body.