Kirkland Signature Hair Regrowth Treatment Extra Strength for Men, 5% Minoxidil Topical Solution, 2 fl oz, 6-packDon't let thinning hair get you down. Kirkland Signature Minoxidil Topical Solution USP, 5 Percent is an extra strength topical hair loss treatment used to help regrow hair on top of the scalp (vertex only). This unscented product reactivates hair follicles to stimulate regrowth and is clinically proven to help regrow hair. It is not intended for frontal baldness or receding hairline. Minoxidil is the number one dermatologist recommended active