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In this study, researchers examined juglone's potential as a restoring agent for hair keratin damaged by permanent or bleaching treatments, finding that juglone formed Michael adducts with cysteine residues, leading to a more regular hair surface as observed via IR spectroscopy and SEM analysis.

This study verified that a new straightening process involving a flat iron, ammonium thioglycolate, and hydrogen peroxide may permanently straighten wavy hair by eliminating disulfide bond distortions.

This review examines the design and evaluation parameters of depilatory formulations but reports no new empirical findings.

In their review, the authors discussed the increasing issue of allergies to hair products, highlighting common allergens such as hair dyes and topical minoxidil, and outlined diagnostic methods and alternatives for those affected, particularly addressing higher risks among hairdressers due to professional exposure.

This study found that chemical treatments like perming, dyeing, and bleaching significantly alter amino acids and lipids in human hair, which may impact hair strength and quality.