May 2026 in “International Journal of Health Management Review” This study found that the use of high pH chemical agents for hair straightening can cause significant damage to hair, including protein degradation and weakened fiber strength, and may lead to permanent scalp conditions like contact dermatitis and cicatricial alopecia.
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September 2019 in “South Asian research journal of pharmaceutical sciences” This article reviews the risks of metal exposure from cosmetic products and emphasizes the need for stricter regulation and consumer awareness, without presenting new data or results.
November 2022 in “Research Square (Research Square)” This meta-analysis suggests a significant association between the use of facial sunscreen and moisturizer and frontal fibrosing alopecia, while finding no significant relationship with hair products or treatments.
January 2021 in “Natural Products Chemistry & Research” This study found that Datura metel leaf and flower extracts could improve hair growth, with leaf extracts prompting quicker growth and mixed extracts enhancing overall regrowth effectiveness in animal models.
October 2001 in “WORLD SCIENTIFIC eBooks” This compilation on contact and occupational dermatology in the Asia-Pacific region discusses various allergens and irritants without reporting new clinical findings.