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[DOI] [PMC free article] [PubMed] [Google Scholar] 10.Grgic T, Grgic D, Drmic D, et al

2025 Aug 23

While elevated MMA blood concentration is considered the specific indicator of deficiency (19), other clinical assays are often used as biomarkers of vitamin B 12 status sometimes in combination

Ciriolo, Targeting Glutathione Metabolism: Partner in Crime in Anticancer Therapy

A very common type of enzyme insufficiency is lactose intolerance, whereby the small intestine doesn't make enough of the enzyme lactase