Does PRP work for hair loss?

Part of: Hair & scalp

PRP for hair has a real signal of benefit in pattern hair loss, but the evidence is much weaker than the marketing suggests. A recent pooled analysis found a difference in favor of PRP, but the variation between studies was very high and the authors rated the evidence as low quality with signs of publication bias. So Dr. Yousef treats PRP as a possible add-on for pattern hair loss, not a guaranteed substitute for diagnosis or the right core treatments.

Key numbers

  • Low — Quality of evidence

Who is most likely to benefit?

  • The best data are in pattern hair loss, not every type of shedding.
  • If the cause is acute telogen effluvium, iron deficiency or a thyroid problem, PRP does not treat the underlying cause.
  • Very advanced loss with clear follicle loss may respond less than a stage where miniaturized follicles remain.
  • Large differences in how PRP is prepared, platelet counts, centrifugation and sessions make a single universal protocol hard to give.

Does it also thicken each hair?

The pooled results did not show a consistent increase in hair thickness, so the strongest current signal is for density rather than a proven increase in thickness.

Key takeaways

  • PRP is not a myth, but it is not a guaranteed treatment; the evidence points to more density with low-quality evidence.
  • The pooled average of +27.55 hairs/cm² does not mean every patient will gain that number.
  • Diagnose the type of hair loss first, then decide whether PRP is worth adding.

PRP for Hair Loss: Does It Help, and for Whom?

Medical references