Vitamin B 12 Injection, 1,000 mcg mL Vitamin B12 Oral vs Injection Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog Vitamin B12 injections deliver high doses of this essential vitamin directly into your bloodstream for better absorption than oral supplements to boost energy, support red blood cell production and maintain nerve function. The Advantages of B12 Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine
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vitamin b12 injection or oral B12 Injections vs. Oral Supplements: Which Works Better?