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Cobalt-deficient diets are also precursors to goat polio

doi: 10.1021/sb500252a [DOI] [PMC free article] [PubMed] [Google Scholar] 46

Losn OC, Song Z, Chen H, Chan DC

Pros: Three active B vitamins (B12, folate, B6) in one tablet, vegan and allergen-free, 100-day supply, chewable format, no added sugars Cons: The combination format means you cant adjust B12 dose independently of folate, no NSF or USP certification 4

PMCID: PMC6494183

The groups most likely to develop B12-related hair and skin changes are the same ones at risk for deficiency generally: vegans and vegetarians, adults over 50, people on long-term metformin or proton pump inhibitors, anyone who's had bariatric surgery, and people on GLP-1 protocols whose reduced appetite has significantly lowered their overall nutrient intake for an extended period