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      learn Estradiol

      an estrogen promoting hair regrowth more commonly used in women

      learn Follistatin

      glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

      learn Hair Fibers

      cosmetic product that temporarily makes hair appear thicker

      learn Biotin

      supplement to help with hair texture and quality

      learn Exosomes

      Microscopic delivery system that sends growth-promoting signals to hair follicles