The Effects of Lower Versus Higher Cell Number of Platelet-Rich Plasma (PRP) in Hair Density and Diameter in Androgenetic Alopecia (AGA): A Randomized, Double-Blinded, Placebo, Paralleled Group Half-Scalp IRB Study

cosmetic plastic surgeon, Loma Linda University Medical Center, Loma Linda, CA.

Aesthetic surgery journal. 2021
BACKGROUND Androgenetic alopecia (AGA) is a common disorder in male and female patients that may benefit from the use of platelet-rich plasma. OBJECTIVES To compare the safety, efficacy, and satisfaction of a lower or higher number of platelets over 6 months. METHODS A prospective randomized, double-blinded, placebo, paralleled group, half-scalp IRB study among eight subjects with moderate AGA. Participants received intradermal PRP injections (baseline and month 3), according to two treatment protocols (high vs low platelet numbers) to the frontal and crown portions of the hemi-scalp and normal saline to control sites. Phototrichoscans were measured at baseline and six months, while global photography and subject and investigator satisfaction questionnaires were obtained at baseline, 3, and 6 months. RESULTS At the end of 6-month evaluation period, both groups demonstrated numerical increases in total hair densities, follicle diameters and terminal hair densities, as well as absolute and percent changes at the frontal and crown targeted sites compared to baseline. These improvements tended to occur more often in areas treated with higher platelet numbers than with lower numbers. Vellus hair densities did not exhibit any significant changes to either PRP dosages. Treatments were assessed by investigator and subjects as "satisfied" at month-3 and were associated with no adverse reactions. CONCLUSIONS Intradermal injections with two therapeutic quantities of platelets were equally safe and efficacious among men and women with androgenetic alopecia. Findings suggest that higher numbers of platelets may have a greater effect than lower number of platelets in regard to hair densities, follicle diameters and terminal hair densities but exhibited minimal effects on vellus hair densities at the month-6 evaluation period. Further studies are required to determine whether any significant advantages occur when delivering either lower or higher numbers of platelets in AGA treatments as long as therapeutic levels are administered.
Study details
Language : eng
Credits : Bibliographic data from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine