Hair & Scalp
Evidence on hair growth, thinning, hair-loss treatments, scalp approaches, and products marketed for healthier or fuller hair.
Hair & Scalp
Rosemary Oil for Hair Growth
Rosemary oil has promising human evidence for hair growth, including a clinical trial that found increased hair counts after six months. The evidence is rated Limited because rosemary oil has not been studied in enough high-quality clinical trials to reach a confident conclusion—not because research has shown that it does not work.
Hair & Scalp
Minoxidil for Women’s Hair Loss
Topical minoxidil is one of the best-supported treatments for female-pattern hair loss. It can increase hair growth and density in some women, but results take time and generally require continued use.
Hair & Scalp
Can You Reactivate Dormant Hair Follicles?
“Reactivating dormant follicles” is a popular hair-growth claim, but dormant is not one single biological condition. Resting or miniaturized follicles may still be capable of producing hair, while follicles destroyed by scarring are fundamentally different. Whether hair can regrow depends heavily on why the follicle stopped producing visible hair.