The goal of this clinical trial is to learn if local scalp injection of human umbilical cord mesenchymal stem cell-derived exosomes (hUCMSC-Exos) can treat androgenetic alopecia (AGA) in male patients with AGA.
The main question it aims to answer is:
Does hUCMSC-Exos injection improve hair regrowth compared with placebo?
Researchers will compare hUCMSC-Exos injection to placebo injection to see if hUCMSC-Exos leads to superior efficacy in hair follicle regeneration, as measured by changes in hair density, hair thickness, and patient-reported outcomes.
Participants will:
Receive randomized, double-blinded local scalp injections of either hUCMSC-Exos or placebo
Attend scheduled follow-up visits for hair assessment and safety monitoring
Undergo photography, trichoscopy, and complete quality-of-life or psychosocial burden questionnaires as applicable