Poly-D,L-Lactic Acid Filler Increases Hair Growth by Modulating Hair Follicular Stem Cells in Aged Skin

    December 2025 in “ Cells ”
    Seyeon Oh, Jino Kim, Hye-Young Choi … Kyunghee Byun
    Studysummary In this study, PDLLA treatment in middle-aged mice was observed to enhance hair growth by increasing macrophage M2 polarization and hair follicle stem cell proliferation, potentially rejuvenating the skin's microenvironment and offering a novel approach for age-related hair loss.
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