Poly-L-lactic acid injections can cause hair loss and skin issues.
January 2025 in “JAAD Case Reports” PLLA dermal fillers can cause hair loss, but it can be treated with steroids.
January 2026 in “JPRAS Open” PDLLA scalp injections improved hair regrowth in most patients with non-scarring alopecia.
April 2025 in “International Journal of Dermatology”
June 2025 in “Clinical Cosmetic and Investigational Dermatology” Hyaluronic acid injections can cause temporary hair loss, but hair can regrow with early treatment.