Are intramuscular vitamin B12 injections more effective than oral vitamin B12 supplementation for treating deficiency? The Advantages of B12 Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Vitamin B12 shots: Uses, benefits, and side effects Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog
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vitamin b12 injection or oral B12 Injections vs. Oral Supplements: Which Works Better?