Kasak, L
However, it can also be the result of low B6, low folate, renal failure, or hypothyroidism
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Cancers (2020) 12(7):1881
Glutamine is an important nitrogen donor for the production of NAD + , in the last steps of both the de novo (from dietary tryptophan) and PreissHandler (from dietary niacin) pathways (Reference Matsuyama, Yoshinaga and Shibue13)