January 2026 in “Molecules” A new perming method is less damaging to hair and works as well as traditional methods.
Prussian Blue causes hair cuticles to detach, weakening the hair.
January 2024 in “International Journal of Cosmetic Science” A new method using 1,4-n-butylene dimaleate effectively repairs and strengthens damaged hair.
20 citations
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December 2012 in “Journal of molecular structure” The study found that thioglycolic acid breaks down hair bonds more consistently than l-cysteine, which is less damaging to hair.
9 citations
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October 1946 in “Experimental biology and medicine” Rats fed soybean oil meal lost hair, but adding inositol, biotin, cystine, or methionine to their diet prevented this and improved growth.