February 2024 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)” Argan, avocado, and coconut oils are absorbed into hair, improving hydration and protection.
3 citations
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January 2009 in “Sen'i Gakkaishi” Using both TGA and DTDG in hair straightening reduces hair damage compared to using TGA alone.
June 2024 in “ChemBioChem” Replenishing free 18-MEA can help restore damaged hair surfaces.
5 citations
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June 2019 in “British Journal of Dermatology” Chemical hair straightening may be linked to a type of permanent hair loss.
23 citations
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April 2006 in “Skin Research and Technology” The study concluded that a special imaging technique showed women with hair loss have slower hair growth and a faulty hair replacement cycle.
January 2018 in “Elsevier eBooks” January 2015 in “Elsevier eBooks” 69 citations
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May 2016 in “General and Comparative Endocrinology” External factors can significantly affect hair cortisol levels, so it's not always a reliable stress marker.
1 citations
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January 2010 in “Elsevier eBooks”
January 2022 in “Clinical Cases in Dermatology” Stress can cause temporary hair loss, which usually gets better after the stress is gone.
1 citations
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January 2017 in “PubMed” All five hair fiber products improved appearance but didn't stick to completely bald areas.
February 2021 in “Journal of the Korean Society of Cosmetology” Castor oil improves the texture of bleached hair by increasing its strength.
June 2008 in “Springer eBooks” 4 citations
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April 1983 in “The Journal of Dermatology” A 15-year-old girl with hypothyroidism had excess hair and skin issues due to blocked hair follicles.
April 2025 in “Pharmaceuticals” APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.
May 2010 in “International Journal of Cosmetic Science” Mercaptans make hair more prone to damage, with reduced hair being more affected than permed hair.
1 citations
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May 2013 in “PubMed” Glycylglycine makes hair softer by improving alignment and changing hair's internal properties.
November 2016 in “University of the Arts London Research Online (University of the Arts London)” Shampoos with polymers and dyes help maintain and enhance hair color vibrancy.
16 citations
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November 2009 in “Experimental dermatology” Ionizing radiation damages human hair follicles by stopping cell growth, causing cell death, disrupting color, and increasing stress and damage markers.
October 2025 in “Revista Científica de Estética e Cosmetologia” Personalized hair care plans are essential for healthy hair.
22 citations
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January 1985 Water makes hair more flexible, especially the outer layer.
9 citations
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January 1988
Platelet-rich plasma (PRP) can help with hair loss and improve hair transplant results.
4 citations
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September 1944 in “The American Journal of the Medical Sciences” July 2025 in “Journal of Investigative Dermatology” BrdU speeds up hair follicle aging and reduces hair quality.
1 citations
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September 2008 in “International Journal of Cosmetic Science” Using chelants in hair dye reduces fiber damage by preventing harmful radicals.
42 citations
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July 2015 in “Cosmetics” Nanotechnology improves hair care products by enhancing ingredient stability, targeting treatment, and reducing side effects, but more research on its toxicity is needed.
Researchers developed a new model for more realistic computer graphics of hair by considering how light scatters on hair fibers.