Platelet-rich plasma injection may be effective for alopecia
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The researchers found that hair density was significantly improved at day 28 and at month six for PRP versus PS (P = 0.0156 and 0.0313, respectively) and PPP (P = 0.042 and 0.046, respectively). There was significant histological improvement between day 28 and month six for PRP versus PPP and PS for vessels (P = 0.0160 and 0.021, respectively), collagen (P = 0.0036 and 0.032, respectively), and epithelium (P = 0.0138 and 0.022, respectively). There was no local toxicity.
"Our study suggests that subcutaneous PRP injections using controlled concentration of platelets and leukocytes improve hair growth," the authors write.