Growth factors are proteins that promote cellular regeneration and tissue repair. Colostrum is a potent source of growth factors and has been shown to have powerful efficacy in healing wounds, building muscle, and maintaining the skin's elasticity. Colostrum is also the only natural source of the two major growth factors transforming growth factors alpha and beta (TGF-a, TGF-b) and insulin-like growth factors 1 and 2 (IGF-1, IGF-2). Colostral IGF-1 increases lean muscle tissue and when used during exercise, switches cellular fuel from sugar to fat, increasing the body’s fat burning capacity.