The present invention provides for compositions, methods and kits for regulating energy metabolism. In one aspect, the invention provides for compositions that comprise a combination of (a) branched chain amino acids, such as leucine, and (b) vitamin B6, or any precursors or metabolites of (a) or (b). These combinations may be synergistic and/or effective for reducing weight or adipose volume. In another aspect, the invention provides for methods of regulating energy metabolism by the administration of one or more compositions comprising branched chain amino acids and vitamin B6. The invention also provides for kits comprising compositions of branched chain amino acids and vitamin B6 packaged in an oral dose form with usage instructions.