oral b12 vs injection Injections vs. Supplements: Which Is Better? Oral vitamin B12 versus intramuscular

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Why HbA1c May Be Unreliable in B12 Deficiency B12 deficiency alters red cell turnover and erythropoiesis, making HbA1c potentially unreliable in either direction the distortion is variable and cannot be predicted

Oral supplementation is more affordable and accessible but may be ineffective in individuals with gastric malabsorption

Key dietary sources of B12 include: Meat Eggs Dairy products Fortified breakfast cereals Other fortified foods These foods provide B12 naturally or are fortified during processing to help prevent dietary deficiencies

Not currently listed on the WADA Prohibited List as of 2026