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Hair-thickness improvements typically appear at around 8 weeks as follicles re-enter anagen. Trichoscopy studies show 20–25 % density increases at 12 weeks, with shaft-calibre gains of approximately 15 %. Results plateau at four months; most patients maintain visible regrowth for about six months before needing a booster. Repeat treatments every 4–6 months sustain the growth-friendly environment. Smokers or patients with finer hair may need more frequent touch-ups.