Described herein are compositions and methods for enhancing or improving sexual performance or for treating sexual dysfunction or impotence comprising administering an effective amount of:a compound of formula (I):wherein n=1 to 10 wherein R1 is an amino acid side chain group (D or L configuration), or derivatives thereof, wherein R2 is a hydrogen atom, or an amino acid (D or L configuration) and derivatives thereof, forming a peptide bond or any pharmaceutically acceptable salts thereof and at least one a nutraceutical effective to enhance sexual performancein association with a pharmaceutically acceptable carrier.
