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Experts explain these safety points in clinical guidance about B12 usage
Colchicine, Neomycin, Aminosalicylic Acid, H2-blockers (e.g., Ranitidine), and Proton Pump Inhibitors (PPIs, e.g., Omeprazole): These oral medications can all interfere with the intestinal absorption of dietary B12, making the need for injectable B12 more pronounced
Some users notice subtle metabolic changes like increased energy or reduced appetite within the first 1-2 weeks
Vegetarian Lifestyles Vegetarians are at risk of developing a B-12 deficiency, due to the vitamin mostly being found in meat, eggs, poultry, dairy products, and other animal products
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