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The American Journal of Clinical Nutrition, 86(6), 17381744
Although IM shots do not offer the same volume and benefits as an IV, they are a great alternative to oral vitamin or amino acid supplementation as they bypass the GI track
[Wiley] 22
Proton pump inhibitors and H2 receptor antagonists, commonly used for gastroesophageal reflux disease and peptic ulcer disease, may affect vitamin B12 status through multiple mechanisms
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