May 2026 in “International Journal of Cosmetic Science” This study investigates the impact of ultraviolet (UV) radiation on hair fiber integrity, comparing it to the effects of bleaching. It simulates solar radiation damage over a Brazilian summer and finds that UV exposure causes cuticular damage similar to bleaching, with increased cystic component oxidation and decreased hydrophobicity. After 192 hours of UV exposure, hair shows significant mechanical degradation, with reduced force at 20% elongation and elongation at break, indicating more pronounced damage than chemical oxidation alone. However, the structural protein degradation from double bleaching is more severe than that from UV radiation, despite comparable enthalpy changes after 192 hours of UV exposure.
20 citations
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January 2003 in “Journal of oleo science” Chemical treatments and daily stresses damage hair, especially the cuticle layer.
February 2025 in “International Journal of Cosmetic Science” Protein carbonylation is a sensitive marker for oxidative damage in hair, especially from light exposure.
September 2025 in “International Journal of Cosmetic Science” Heat and UV exposure damage hair structure by altering keratins.
4 citations
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August 2014 in “Journal of molecular structure” Chemical treatments on bleached black hair change its internal structure by breaking and reforming bonds, and treatments with hydrolyzed eggwhite protein help repair it.
3 citations
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September 2021 in “Data in brief” Bleaching hair changes its structure and weakens it, which is important for understanding hair damage and creating treatments.
25 citations
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December 2011 in “Surface and interface analysis” Bleaching hair causes significant damage by breaking down proteins and fatty acids.
3 citations
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January 2019 in “International Journal of Trichology” The balance of thiol-disulfide in women with hair loss is affected but not damaged.
65 citations
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May 2010 in “Current Women's Health Reviews” Oxidative stress is a key factor in the development of Polycystic Ovary Syndrome, and weight management can improve symptoms.
18 citations
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October 2018 in “Nutrients” Annurca apple extract promotes hair growth by changing hair follicle metabolism to boost keratin production.
16 citations
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October 2015 in “Photochemistry and photobiology” Reducing copper (II) ion levels in hair can decrease hair damage.
1 citations
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January 2017 in “Tohoku journal of experimental medicine” A woman's mature cystic teratoma caused her virilization by producing testosterone.
14 citations
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August 2014 in “Applied Physiology, Nutrition, and Metabolism” A low-starch/low-dairy diet may help overweight women with PCOS lose weight and improve metabolism, but more research is needed.
81 citations
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November 2012 in “Journal of the National Cancer Institute” The tumor suppressor gene FLCN affects mitochondrial function and energy use in cells.
January 2013 in “Sen'i Gakkaishi” Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
67 citations
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August 2013 in “International Journal of Cosmetic Science” Hair greying is caused by oxidative stress damaging hair follicles and melanocytes.
126 citations
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January 2009 in “International Journal of Trichology” Oxidative stress contributes to hair graying and loss as we age.
December 2025 in “Insights-Journal of Health and Rehabilitation” PCOS significantly harms married women's quality of life, affecting mental health, fertility, and body image.
4 citations
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January 2007 in “Sen'i Gakkaishi” Permed hair degrades faster and shows more damage after protease treatment compared to untreated hair.
1 citations
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December 2021 in “Pakistan biomedical journal” Eating certain seeds may help reduce symptoms of Polycystic Ovary Syndrome.
December 2019 in “University of Malaya Students Repository” Mimosine from Leucaena leucocephala can enhance biodiesel stability.
38 citations
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October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.
2 citations
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September 2004 in “International Journal of Cosmetic Science” Hair quality is genetically determined and linked to its composition and strength.
January 2020 in “Asian journal of applied science and technology” Good nutrition is crucial for health and preventing disease, and supplements can help prevent nutrient deficiencies.
19 citations
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January 2015 in “Current problems in dermatology” Ultraviolet rays damage hair, smoking may cause hair loss, and good nutrition is important for hair health, but genetics mainly decide hair thickness.
3 citations
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May 2021 in “Dermatologic Clinics” The document concludes that more research is needed to understand hair loss in men and to find new treatments.
January 2026 in “RSC Advances” Epristeride's metabolism in zebrafish helps improve doping detection methods.
99 citations
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June 2005 in “Journal of Cosmetic Dermatology” Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.
79 citations
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January 2017 in “Dermatology practical & conceptual” Correcting nutrient deficiencies may help with hair loss, but the benefits of supplements without a deficiency are uncertain and could be harmful.
18 citations
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August 2014 in “Lipids” Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.