52 citations
,
February 2005 in “Biopolymers” Chemical hair straightening changes hair proteins and mostly fixes broken bonds.
4 citations
,
January 2021 in “Skin appendage disorders” Hair straightening can damage hair and pose health risks, including exposure to carcinogens and hair loss.
Thermal straightening can damage ethnic hair and may pose health risks.
2 citations
,
January 2019 in “Applied clinical research, clinical trials and regulatory affairs” Different countries have regulations to ensure the safety of hair care products, with some recalling hair straighteners due to high formaldehyde.
May 2014 in “Hair transplant forum international” Scalp tools, tracking progress, targeting scalp inflammation, and avoiding certain hair treatments can improve female hair loss treatment.
40 citations
,
June 2013 in “Journal of cosmetic dermatology” Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
3 citations
,
January 2004 in “Sen i Gakkaishi” DTDG in hair treatments reduces damage and preserves hair structure.
Brazilian keratin treatment can cause skin reactions like eczema.
February 2022 in “Fibers” Scientists created a non-toxic, sugar-based hair product that can style hair without damage.
23 citations
,
June 2014 in “International Journal of Cosmetic Science” Glyoxylic acid is a safer alternative to formaldehyde for hair straightening and effectively changes hair structure.
February 2025 in “International Journal of Cosmetic Science” A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.
10 citations
,
October 2016 in “Journal of Biomolecular NMR” Solid-state NMR can effectively study keratin structure and treatment effects in fur.
3 citations
,
January 2009 in “Sen'i Gakkaishi” Using both TGA and DTDG in hair straightening reduces hair damage compared to using TGA alone.
2 citations
,
May 2022 in “International Journal of Trichology” Brazilian Keratin Treatment can cause skin reactions like redness and scaling, possibly due to formaldehyde.
47 citations
,
January 2017 in “RSC Advances” Keratin peptides can change hair shape gently without harsh chemicals.
Hair keratin treatments can be harmful, potentially causing health issues like skin reactions and cancer.
70 citations
,
June 1998 in “Polymer” Permanent waving damages hair by disrupting its keratin structure.
December 2025 in “The American Journal of Medical Sciences and Pharmaceutical Research” Ultrasonic and infrared treatments can improve hair strength and appearance with minimal damage.
2 citations
,
January 2014 in “Sen i Gakkaishi” The new hair straightening method keeps hair straight permanently by using specific creams and heat.
13 citations
,
March 2019 in “Journal of cosmetic dermatology” Heat damages hair, with Asian hair losing more protein than Caucasian hair.
11 citations
,
June 2013 in “PubMed” The automated flat iron can permanently straighten hair without chemicals, especially at 154°C, and silicone improves the results.
1 citations
,
October 2021 in “Indian Journal of Plastic Surgery/Indian journal of plastic surgery” Proper hair care and safe use of hair products are crucial for those with hair loss.
Certain ingredients in personal care products, like formaldehyde, oxidative hair dyes, and sulfates, pose health risks and need careful review.
25 citations
,
May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.
13 citations
,
November 2012 in “International Journal of Dermatology” Curly hair breaks more easily, especially with chemical treatments, but simpler grooming reduces breakage.
January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.
2 citations
,
May 2002 in “Clinics in Dermatology” Ethnic differences in hair and skin are significant and under-researched, requiring tailored dermatologic treatments and more study.
193 citations
,
January 2015 in “International journal of trichology” Dermatologists need to understand hair products to treat hair and scalp issues better.
4 citations
,
December 2018 in “Macedonian Journal of Chemistry and Chemical Engineering” A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.
2 citations
,
June 2022 in “Revista de la Asociación Colombiana de Dermatología y Cirugía Dermatológica” Understanding cultural hair care practices is essential for improving hair health in the African American population.