research Physical and mechanical properties of the hair shaft: A review of measurement techniques to verify the efficacy of cosmetic products January 2024 in “Seven Editora eBooks” Different techniques measure hair properties to ensure cosmetic products work.
research Exogen hair characterization in human scalp 35 citations , March 2007 in “Skin Research and Technology” The conclusion is that exogen is a unique hair cycle phase and the new sampling method specifically targets this stage, which may help in future hair loss research.