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The lowered absorption rate and increased frequency attributed to oral supplements can cause the overall treatment process via tablets to be slower than that of B12 injections

Although small amounts of unconverted Cyanocobalamin will remain in the system, this is typically nothing more than is left behind from the consumption of common supplements and foodstuffs containing B vitamins

Another factor that can increase the risk of a B12 deficiency is a lack of a diverse diet, says Emily Peron, associate professor in the department of pharmacotherapy and outcomes science at Virginia Commonwealth University