PowerBar ProteinPlus protein bar is a great choice for use before and after activities like weightlifting and strength training where protein intake has been shown to help improve growth and reduce breakdown of muscle. It also helps build a lean body and provides sustained energy for athletes who want more protein. PowerBar ProteinPlus protein bar contains 23g of PowerBar's TriSource_ protein blend, a proprietary blend of whey, soy and casein proteins for a steady supply of muscle-building amino acids