A PRP consultation should explain which hair-loss condition the proposed series would treat.

One trial found improvement

A 2020 randomized trial enrolled 30 women with androgenetic alopecia. After three sessions, blinded photographs at week 24 showed improvement in 57% receiving PRP versus 7% receiving saline. Two participants were lost to follow-up. Reported adverse effects included headache, scalp tightness, swelling, redness and bleeding. [2]

Another trial complicates the picture

A separate randomized study treated opposite scalp areas in 35 participants with androgenetic alopecia, using PRP or saline. Hair density increased on both sides, with no significant difference in the change between them. Possible diffusion between areas and microinjury from injections limited interpretation. [3]

These studies do not establish PRP recovery from GLP-1-associated shedding or a universal injection schedule. For the assessment conversation, see our hair history guide.

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This article provides general education, not a diagnosis or an individual treatment plan. Medication information refers to US sources. Discuss medication, nutrition and cosmetic treatment decisions with qualified clinicians.

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Sources

  1. Hair loss: Diagnosis and treatmentAmerican Academy of Dermatology, US patient guidance↩ Back to text
  2. The effect of platelet-rich plasma on female androgenetic alopecia: A randomized controlled trial, 2020Dubin and colleagues, Journal of the American Academy of Dermatology↩ Back to text
  3. Evaluation of platelet-rich plasma as a treatment for androgenetic alopecia: A randomized controlled trial, 2020Shapiro and colleagues, Journal of the American Academy of Dermatology↩ Back to text