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These belong to three older but still widely used drug classes
The goal of this article is a neutral, factual, and safety-centric overview, not to promote or vilify any of these injectable substances to non-doctor use or provide a means to acquire them
Methylcobalamin is the most bioavailable and active form of B12, which is why its the form we recommend in our B complex and multivitamin supplements
Its also since been FDA-approved to help reduce the risk of major cardiovascular events, like stroke, heart attack, or death for people with type 2 diabetes and existing heart disease