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Similarly, if you use proton pump inhibitors or H2 receptor antagonists for acid reflux or peptic ulcers, your stomach acid levels may decrease, making it harder for your body to absorb B12 from your diet
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keep unmixed vials cool and away from light
SLIDESHOW See Slideshow What precautions should you take with vitamin B12 shots
Two downstream consequences are mechanistically central: nicotinamide is preserved for re-entry into the NAD+ salvage pathway (raising intracellular NAD+ availability), and SAM is preserved for other methylation reactions
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