The short list of hair loss treatments with real trials behind them

There is a Cochrane review of interventions for female pattern hair loss and a published summary of evidence-based treatments. That is an unusually solid foundation for a category this crowded, and it is almost never where the conversation starts.

Minoxidil is the most studied topical option and its mechanism of action on hair growth is documented rather than inferred. Low-level light therapy has been through at least one randomized 24-week trial. Both are narrower in effect than the advertising suggests and better evidenced than most alternatives.

Treatments that push resting follicles back into growth have to end the resting phase first, and ending it means the old hair lets go. From outside, that is indistinguishable from deterioration, and it arrives at roughly the point people expect improvement.

The practical discipline is unromantic: change one variable, photograph the part line in fixed light on day one, and do not judge before week twelve.

Quality of life in women with female pattern hair loss has been formally studied, and the impact is substantial. That research exists precisely because the complaint has historically been dismissed. Anyone treating this as cosmetic triviality is arguing against the literature.