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This is largely because our stomachs tend to produce less acid as we get older
For the relative abundance data, phyla and genera data were first transformed by adding 1e13 to each sample
These include: Anaphylaxis : A severe, life-threatening allergic reaction that needs immediate help
Peripheral vascular thrombosis: Increased risk of clotting in individuals with elevated levels
Fatigue Fatigue is a common symptom of B12 deficiency, but evidence that B12 beyond the correction of deficiency has any benefits for energy is lacking
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