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Unlike other vitamins, the absorption of vitamin B12 depends on a protein produced in your stomach, called intrinsic factor
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Estimates for observed Prescriptions for parenteral B12 It is clear that there is a considerable excess of observed over expected
In addition, if you're one of the millions of Americans taking proton pump inhibitors (PPIs) that suppress stomach acid for conditions like acid reflux, you're going to be prone to vitamin B12 deficiency
The Synergy of B Complex: Food, Absorption, and Supplementation B vitamins work best when taken together, not just individually
Doctors should watch for these interactions to avoid serious health problems
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