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However, certain circumstances warrant medical review and potential investigation
Chronic heavy alcohol consumption impairs B12 status through poor dietary intake, malabsorption, and liver disease
Vegan diets, excessive alcohol use, certain medications, aging, and certain stomach diseases all raise the risk of vitamin B12 insufficiency
An IM injection delivers medicine directly into a muscle rather than under the skin, allowing faster absorption and avoiding some of the delays or limits of oral or subcutaneous routes
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