https://pubmed.ncbi.nlm.nih.gov/24836650/?utm_source=mdhair_blog&utm_medium=mdhair_blog&utm_campaign=caffeine-how-does-it-benefit-hair
This study reveals new growth-promoting effects of caffeine on human hair follicles in subjects of both sexes at different levels (molecular, cellular and...
differential effectshair shaftcaffeineelongationmatrix