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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
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Because most of what the test measures is inert haptocorrin-bound B12, it is entirely possible to have a normal or even high total B12 while your cells are functionally short
It is not a standalone weight loss treatment and is not FDA-approved to diagnose, treat, cure, or prevent any disease
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