Regaine for Men Extra Strength Scalp Foam contains 5% minoxidil, clinically proven to help stop and reverse hereditary hair loss in men. This foam formulation is designed to be easily absorbed into the scalp and is most effective when used twice daily. This product is specifically formulated for men aged 18-49 experiencing hereditary hair loss. When used as directed, visible results can be seen as early as 8 weeks, with optimal results appearing after 16 weeks of consistent use. The foam format is designed to dissolve quickly into the scalp without leaving a greasy residue. Note that during initial weeks of use, temporary increased hair shedding may occur as part of the normal hair growth cycle.