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Vitamin B12 is required for creating new red blood cells

It is not a drug, food, or cosmetic and may not be misbranded, misused, or mislabeled

Sources NIH Vitamin B12 Fact Sheet for Health Professionals Krzywaski, J., Mikulski, T., Pokrywka, A., Myczak, M., Krysztofiak, H., Frczek, B., & Ziemba, A

We flag it only to be complete and honest about where the science actually stands, because responsible information means clearly separating what is proven from what is still being studied

Oral and Sublingual Forms For individuals without absorption issues, tablets and sublingual drops or sprays may suffice for maintenance

So be careful not to rely on them long term