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B12 Injections vs Oral Supplements: Which Is Better? B12 Injections vs. Oral Supplements: Which Is Better? What is Vitamin B12? Vitamin B12 is a water soluble vitamin essential for both fatty acid and amino metabolism as well as DNA synthesis. It is vital for the normal functioning of the Vitamin B12 Injections vs. Supplements: Which is Right for You? Vitamin B12 Oral vs Injection
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