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What are the differences between vitamin B12 methylcobalamin, cyanocobalamin, and methylcyanocobalamin?

1 doctor weighed in

In brief: See below

The body needs to methylate B-12 so it becomes biologically active to engage in chemical reactions, so the methylated forms are in that category, and the other would need chemical transformation to be active.
Lately, there seem to be some concerns regarding safety and efficacy of the cyanocobalamin, but not a proven fact.

In brief: See below

The body needs to methylate B-12 so it becomes biologically active to engage in chemical reactions, so the methylated forms are in that category, and the other would need chemical transformation to be active.
Lately, there seem to be some concerns regarding safety and efficacy of the cyanocobalamin, but not a proven fact.
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