Compositions that include vanadium or vanadyl chelated to an amino acid are disclosed, particularly vanadium or vanadyl chelated to creatine, arginine, citrulline, taurine, phenylalanine, glutamine, glutathione, leucine, or combinations thereof. In addition, compositions that included blended forms of such chelates and/or vanadyl sulfate and one or more unbound amino acids. Still further, the compositions disclosed may further include one or more additional proteins, amino acids, vitamins, minerals, or combinations thereof, which impart an additional nutritional and/or therapeutic benefit to the composition.
