You don't need muscle powder, because there is vitamin B in muscle powder. Whey protein itself has no vitamins, and a high-protein diet will consume b6. If you eat less fruits and vegetables, you will easily lack b6, causing seborrheic dermatitis and acne. It's best for family B to take vitamins together, but it's still good, just 2 1 Jinweita. Group B is water soluble, but it seems to be fat soluble.