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b12 injection vs sublingual The Advantages of Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Efficacy of sublingual versus oral
Description
For pernicious anemia, lifelong B12 supplementation, often via injections, is standard

Are there any side effects from B12 injections

According to physician observations reported by Avena Natural Health, B12 shots address a single nutrient through direct injection, while IV infusions offer broader support by combining hydrating fluids with diverse micronutrients

eNeuro 7 (3), e1e17
Some people report feeling more energetic within a few days of getting a B12 shot