research Alteration in Hair Texture Following Regrowth in Alopecia Areata 7 citations, July 2011 in “Archives of Dermatology” Alopecia areata caused a boy's hair to regrow straight instead of curly, but the exact reason is unknown.
research Using Proteomics to Compare the Molecular Structures of Sulfide and Permeate-Depilated Sheepskins January 2024 in “Collagen and leather” The conclusion is that using bovine milk permeate to remove wool from sheepskins is eco-friendly and results in smoother, higher quality leather compared to traditional sulfide methods.