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Vitamin B12 is found naturally in only animal derived products such as eggs, meat, fish, dairy, and shellfish
Oral supplements, on the other hand, are taken as tablets or liquids and must pass through the stomach and intestines, where absorption can be slower and weaker, especially for patients with digestive problems
Why B12 Injections Work Better Than Tablets for Some People When you take B12 as a tablet, it travels through your digestive system before reaching your bloodstream
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