A kit comprising a composition comprising (a) a monoamine oxidase (MAO) inhibitor selected from the group consisting of clorgiline, paragyline, lazabemide, selegiline, phenelzine, and rasagiline, and, in the same composition or in a different composition, a vasodilator selected from the group consisting of minoxidil, apigenin, hydralazine, prostaglandin, and prostacyclin, in an amount effective to improve hair growth in a subject in need thereof, wherein the composition comprising the monoamine oxidase (MAO) inhibitor comprises from about 0.1% to about 20% of the monoamine oxidase (MAO) inhibitor, by weight of the composition, and wherein the composition comprising the vasodilator comprises from about 0.01% to about 20% of the vasodilator, by weight of the composition;
- and (b) instructions for applying said composition(s) to the skin of the subject;
- wherein the composition improves hair growth in a subject in need thereof to a greater degree than administering the MAO inhibitor or the vasodilator alone.