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As the hair shaft primarily comprises keratin, enriched in cysteine, we postulate that these trichoscopic signs might be manifestations of localized reduction or metabolic disturbances of cysteine in keratin
It is most active at a slightly acid pH and is strongly stimulated by bisulfite and phosphoglycolate
17,18 In addition, in some cell types, NADPH binds to the important H 2 O 2 -disposing enzyme: catalase, and reactivates it when it has been inactivated by H 2 O 2
4.8 Hepatoprotective effects 4.8.1 Protection against chemical - induced liver injury Liver damage caused by chemical substances, such as pharmaceuticals, alcohol, and environmental pollutants, is a prevalent issue
