TLDR Chemical dyes damage hair's internal structure more than perming, as shown by a special imaging technique.
The study investigates the microstructure of human hair using Single Detector Optical Coherence Tomography (SD-OCT). Hair, primarily composed of keratin and various amino acids, serves as a crucial protective barrier for the human scalp. Despite common perceptions of hair as merely a metabolic byproduct, the research underscores its significant protective value.
4 citations,
June 2020 in “JAAD case reports” Permanent hair dye may cause total hair loss.
4 citations,
January 2016 in “Skin research and technology” Oxidative hair dye changes hair color and structure but doesn't weaken it.
10 citations,
January 2011 in “Journal of biomedical optics” OCT is a reliable, noninvasive way to measure hair thickness.
9 citations,
November 2018 in “Journal of cosmetic dermatology” Orobanche rapum extract rejuvenates skin and protects skin bacteria, leading to healthier skin.
13 citations,
January 2017 in “Cosmetics” Different tests are used to see how hair care products affect hair, and choosing the right test is important for accurate results.
January 2024 in “GeroScience” Using radiation to make mice's hair turn gray helps study and find ways to prevent or reverse hair graying.
February 2025 in “Theranostics” 3D bioprinting with special hydrogels can create artificial skin that heals wounds and regrows hair in mice.
Human hair keratins can self-assemble and support cell growth, useful for biomedical applications.
