research Implication of MicroRNA Regulation in Para-Phenylenediamine-Induced Cell Death and Senescence in Normal Human Hair Dermal Papilla Cells 8 citations, March 2015 in “Molecular Medicine Reports” Hair dye ingredient PPD causes cell death and aging in human hair cells by altering microRNA levels.
research Vitamins and Their Derivatives Synergistically Promote Hair Shaft Elongation via PlGF/VEGFR-1 Signalling Activation 1 citations, September 2022 in “Journal of dermatological science” Certain vitamins and their derivatives can help hair grow longer by activating specific growth signals.