TLDR PRP therapy is a simple and safe option for hair loss, but its effectiveness is not clearly stated.
The document from October 26, 2017, indicates that Platelet-Rich Plasma (PRP) therapy was considered a simple and safe treatment option for patients experiencing hair loss, provided that patients' expectations regarding the treatment outcomes were properly managed. However, the document does not provide specific data on the number of people treated or the extent of the efficacy of PRP for hair loss, which are important factors in determining the strength and reliability of the treatment's reported benefits.
2 citations,
March 2020 in “Plastic and Reconstructive Surgery” The book provides guidelines for using PRP and microneedling in skin treatments, despite limited scientific data.
1 citations,
February 2020 in “International journal of research in dermatology” PRP therapy is effective for hair loss, skin rejuvenation, wound healing, and scar treatment.
25 citations,
September 2019 in “PubMed” Platelet-Rich Plasma (PRP) is helpful for skin and hair treatments and works better when combined with other procedures.
January 2019 in “Springer eBooks” Platelet-rich plasma therapy may have benefits and is generally safe, but more research is needed to confirm its effectiveness and safety.
October 2016 in “Journal of Dermatology and Cosmetic” 
113 citations,
July 2015 in “Journal of Cosmetic Dermatology” Platelet-rich plasma may help with hair growth and skin quality but more research is needed to confirm its effectiveness.