research Isolation and Quantification of Glycosaminoglycans from Human Hair Shaft 6 citations, January 2016 in “Annals of Dermatology” Human hair contains more glycosaminoglycans in children than adults, and these compounds decrease with age, possibly affecting hair thickness.
research Human αβ and γδ T Cells in Skin Immunity and Disease 83 citations, June 2018 in “Frontiers in immunology” Certain types of T cells are essential for healthy skin and play a role in skin diseases, but more research is needed to improve treatments.