A total of 50 patients with androgenetic alopecia were selected for the study. Patients who met the inclusion/exclusion criteria were randomly assigned to groups A and B in a 1:1 ratio to receive treatment, with the enrollment date designated as Day 1. Group A visited the clinic once each in the first, second, and third months for treatment with exosomes, while Group B visited the clinic twice each in the first, second, and third months for treatment with exosomes. At the time points of 1, 2, 3, and 6 months after the start of the treatment period, dermatoscopic examinations were conducted on patients in both groups. The differences in hair growth density, hair shaft thickness, and follicle counts within a 1 cm diameter area were compared between the two groups. Additionally, the data differences for each subject at baseline and at the end of the experiment were also assessed.

Inclusion Criteria:Clinical diagnosis of Androgenic alopecia · AGA classification include：The No grade for male hair loss was II-V, and the Ludwig grade for female hair loss was I-III Exclusion Criteria: (1) Using medications or supplements, including finasteride, dutasteride, minoxidil or any other hormonal products, that can affect hair growth; · (2) Patients with severe diseases, immune diseases, endocrine diseases and nervous system diseases; (3) Patients with infection, allergic disease and malignant tumor