can you take b12 oral and injections Vitamin vs. Supplements: Which Works Best? B12 Injections vs Oral Supplements:

The molecular weights are similar, and the difference only comes from the methyl substitution of glycine (Gly) and alanine (Ala)

Greenway FL, Fujioka K, Plodkowski RA, Mudaliar S, Guttadauria M, Erickson J, et al

Vitamin D, often called the sunshine vitamin, helps the body absorb calcium, supporting strong bones and teeth

So, why would you want to give your body a molecule that it doesnt make

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