If you are dealing with thinning hair, a receding hairline, or excessive daily hair fall, traditional oils or superficial hair masks won't solve the root problem. The Minimalist Hair Growth Actives 18% Hair Serum is a concentrated, clinical-strength leave-on scalp treatment. It combines five proven, globally sourced hair growth technologies to breathe life back into dormant follicles, drastically reduce shedding, and promote visibly thicker, denser hair.