Compositions are disclosed that include undenatured whey protein and glycine. The undenatured whey protein is preferably included at a final concentration of about 20%-80%, while the glycine is present at a final concentration of about 5%-35%. The whey protein has not been exposed to acid hydrolysis and, preferably, includes cold cross-flow membrane filtrate. The glycine is preferably 20-80 mesh in size, and exhibits a U.S. Pharmacopeia (USP) 28 grade. The composition further includes several vitamin and mineral cofactors, namely, selenomethionine, nicotinamide adenine dinucleotide (NADH), and Vitamin B3.
