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Metabolism of sulfur containing amino acids Methionine and cysteine are both required for protein synthesis by simple-stomached mammals and avian species [1]

Crucially, high doses of folic acid can mask vitamin B12 deficiency symptoms whilst allowing potentially irreversible neurological damage to progress

This is less common with liposomal forms, as the nutrient is protected and absorbed more efficiently

The antioxidants are also classified as enzymatic (natural) oxidants (includes glutathione reductase, catalase, superoxide dismutase) and non-enzymatic oxidants, (includes vitamins B, C and E, carotenoid, carnitine, cysteine), which are derived from fruits and vegetables 83

PMID 30114478