Global Hair Loss & Growth Treatment Market Size, Share & Demand Report By Product Type (Pharmaceutical Treatments, Medical Devices & Procedures, Cosmetic & OTC Products, Regenerative Medicine), By Application (Androgenetic Alopecia, Alopecia Areata, Telogen Effluvium, Other Hair Loss Conditions), By Distribution Channel (Retail Pharmacies, Hospital Pharmacies, E-commerce Platforms, Specialty Clinics & Dermatology Centers), By End User (Dermatology Clinics, Hair Transplant Clinics, Hospitals, Homecare Users), By Region & Segment Forecasts, 2026–2031