Rossiello F, Jurk D, Passos JF, dAdda di Fagagna F
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Anyone can be affected, but some groups are more at risk: Vegetarians and vegans, since B12 mainly comes from animal products Older adults, as absorption gets harder with age People with digestive issues like Crohns or coeliac disease Those taking certain medications, such as long-term metformin or stomach acid reducers People with pernicious anaemia, an autoimmune condition that stops you from absorbing B12 If you fit into one of these categories and notice symptoms, its worth getting your levels checked
Material and methods: The review authors independently screened and evaluated studies identified through medical databases, including PubMed, Scopus, and institutional repositories
However, these findings remain exploratory and non-clinical