Abstract: Neuro-metabolic and endocrine-function regulating/modulating compositions, are disclosed. The compositions of the present invention comprise Selegiline Hydrochloride, Procaine Hydrochloride, Vinpocetine, trimethylglycine, and an ingredient selected from a group consisting of N-nicotinoyl-gamma-aminobutyric acid (N-GABA), niacin, niacinamide, gamma-aminobutyric acid (GABA), and combinations thereof. Methods of using the compositions, compositions, and compositions of the present invention are also disclosed.