PRP (platelet-rich plasma) and, more recently, exosome therapy are frequently offered alongside hair transplant procedures as a way to support healing and potentially improve outcomes. Here's an honest look at what the evidence actually supports.
What each treatment involves
- PRP: A concentration of your own blood platelets, injected into the scalp to deliver growth factors that may support healing and follicle health.
- Exosomes: Cell-free signaling molecules, delivered via injection, that may support tissue healing through a different mechanism than PRP. See our sister site's exosome therapy explainer for the fuller science.
These are considered supportive treatments, not primary solutions — the evidence supports them as a reasonable complement to transplant surgery or medical therapy, not as an independent alternative to either.
What the evidence honestly shows
PRP has a more established evidence base specifically for hair restoration than exosome therapy does, which remains an active area of ongoing investigation. Both show reasonable safety profiles when administered by qualified providers, but neither should be presented as guaranteed to significantly change your outcome.
When it's typically recommended
- Alongside a transplant, to potentially support graft survival and healing
- As part of a broader treatment plan for diffuse thinning not solely addressed by transplant surgery
- As a maintenance treatment for existing native hair alongside transplanted grafts
A fair question to ask
If a clinic recommends adding PRP or exosome therapy to your treatment plan, ask specifically what outcome they expect it to support and what the actual evidence behind that claim looks like — a confident, specific, appropriately hedged answer is a good sign.
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