does sublingual b12 work as well as injections What Are Injections? And Are They Safe? Vitamin B12 Injections - Vie
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Do Alcohol Affect B12 Levels

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Drug/Laboratory Test Interactions: Persons taking most antibiotics, methotrexate and pyrimethamine invalidate folic acid and vitamin B 12 diagnostic blood assays

It doesn't create it from nothing

B12 Intravenoso: International Prescribing Practices In some places, doctors use intravenous vitamin B12, called B12 intravenoso. These are given in a doctors office

Injectable B12 bypasses this digestive process
