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“Understanding these levels are important, as the presence of redox active metals, such as copper and iron , can impact fibre health, either as a result of UV irradiation, or during the hair colouring process.”
Annals of nutrition & metabolism • 1994 | View Paper
“For other nutrients, such as iron and zinc, the bioavailability from vegetable foodstuffs is reduced when the intake of phytates and fibre is high; thus, the prevalence of iron deficiency can be increased despite high vitamin C intake.”