US Patent 7629384 Topical delivery of L-arginine to cause beneficial effects

The application of L-arginine and its derivatives to the skin causes beneficial effects of wound healing, increasing erectile function and increased growth of hair when applied in sufficient quantity to the skin. A hostile biophysical agent may be combined with the L-arginine to increase its absorption into the skin. The desired concentrations of the hostile biophysical agent is increased when concentration of L-arginine is less than 20% of the concentration of the substance applied to maximize its effect.