5 citations
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March 2012 in “Microscopy Research and Technique” UVB radiation changes the chemical makeup and dries out human hair but doesn't alter its appearance or texture.
137 citations
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June 2005 in “Climacteric” Estrogen loss during menopause worsens skin health, but hormone replacement therapy may improve it, though more research is needed.
7 citations
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March 2019 in “Journal of cosmetic dermatology” African hair has the most lipids, while Caucasian hair is more hydrated and stronger.
Hyaluronic acid in shampoo penetrated hair well, reduced frizz, and improved hair strength and moisture.
October 2017 in “Anesthesia and Pain Medicine” Repeated left stellate ganglion blocks may improve skin elasticity, water content, and hair follicle density on the treated side.