February 2019 in “PubMed” The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.
9 citations
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March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
3 citations
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September 2020 in “Journal of cosmetic dermatology” Coconut oil makes hair stronger and more flexible than mineral oil.
1 citations
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January 2010 in “Biological and medical physics series” Human hair's structure and properties were studied using advanced microscopes and mechanical tests.
July 2026 in “Preprints.org” A cysteamine-derived compound helps hair stay straight in high humidity.