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Testing MTHFR and other relevant genetic markers can identify these individuals, though routine genetic testing for b12 supplementation decisions remains controversial

Compound CID 950107. National Center for Biotechnology Information

10.1161/CIRCRESAHA.119.315886 31 SuterT.MeyerJ

First, routine screening for vitamin B12 deficiency should be incorporated into primary care for high-risk populations such as older adults, women of reproductive age, vegetarians, and patients with diabetes or chronic use of metformin or proton pump inhibitors

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