Beyond <scp>PRP</scp> : Recognizing the Evolving Generations of Platelet Concentrates in Androgenetic Alopecia Treatment—A Letter in Response to Zhong Et al

The document discusses the evolution of platelet concentrate technology beyond platelet-rich plasma (PRP) for treating androgenetic alopecia (AGA). It highlights the development of platelet-rich fibrin (PRF) as a second-generation product and concentrated growth factor (CGF) as a third-generation preparation. The latest advancement is the CGF-purified fraction (CGF-PF), which retains bioactive components like extracellular vesicles and exosomes, offering a distinct mechanism of action through vesicle-associated signaling. Preliminary observations suggest CGF-PF may improve injection tolerability and target hair follicle stem cell pathways more effectively. The authors call for further studies to compare CGF-PF with conventional CGF to establish its efficacy.