TLDR Atomic Force Microscopy is a more accurate way to assess hair damage and the effect of cosmetic treatments.
The study investigated the mechanical properties of human hair fibers, specifically the cortex region, using Atomic Force Microscopy (AFM) in force volume mode. The researchers examined both chemically damaged hair (through bleaching) and hair without chemical damage, with and without cosmetic treatment. The results showed a significant decrease in the natural logarithm of Young's modulus (ln(E)) mean value for chemically damaged fibers. The study concluded that AFM provides a more accurate method to evaluate hair damage and the performance of cosmetic treatments, offering detailed information about the hair's structure.
3 citations,
July 2019 in “Fibers And Polymers/Fibers and polymers” 
11 citations,
February 2019 in “Frontiers in Physiology” Hair properties are interconnected; a comprehensive, cross-disciplinary approach is essential for understanding hair behavior.
10 citations,
January 2011 in “Skin research and technology” Procyanidin oligomers can protect hair from oxidative damage and could be good for hair care products.
81 citations,
December 2007 in “Acta materialia” AFM helped show how hair changes under tension and the effects of damage and conditioner.
254 citations,
January 2007 in “Chemical Society Reviews” Hair is a complex protein fiber with unique properties useful for developing hair products.
10 citations,
January 2012 in “Journal of biomedical optics” Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.
7 citations,
December 2020 in “ACS biomaterials science & engineering” Human hair keratins can form stable nanofiber networks that might help in tissue regeneration.
43 citations,
September 2001 in “Scanning” Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.
15 citations,
August 2020 in “Analytical chemistry” Hair lipids do not protect against humidity.
8 citations,
November 2022 in “International Journal of Cosmetic Science” Human hair varies widely and should be classified by curl type rather than race.
