PRP therapy in the post-transplant period — delivered to the recipient area in the weeks after a hair transplant — has been proposed as a way to improve graft survival and accelerate growth. Here is what the evidence shows and whether it is worth considering.
The biological rationale is sound: PRP delivers growth factors (PDGF, VEGF, EGF) to the recipient area at a time when the transplanted follicles are establishing their neovascularisation and preparing to re-enter the anagen phase. These growth factors theoretically support this process and may improve the proportion of grafts that establish successfully.
Several studies have assessed PRP administered intraoperatively (to the grafts before implantation or to the recipient area during the procedure) and perioperatively (in the weeks after surgery). Results are generally positive but variable — some studies show significantly improved graft counts and earlier growth onset with PRP, while others show modest or no benefit over sham treatment.
The heterogeneity of results likely reflects variability in PRP preparation protocols (platelet concentration, activation method) and in the populations studied. PRP is not a single standardised product — a well-prepared PRP with high platelet concentration is meaningfully different from a poorly prepared one.
The practical question: is post-transplant PRP worth adding to your plan? For patients with adequate budget who want to optimise every aspect of their result, a course of two to three PRP sessions in the first three months post-procedure is a reasonable addition. It is unlikely to rescue a poorly performed procedure, but as an adjunct to a well-performed one, the evidence suggests modest benefit.
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