B12 supplements to take, according to an expert - These are the best B12 supplements on the market, according to a nutritional therapist ...

and only occur with B12 injections, not oral supplementation, Allen says. Vitamin B12 injections are typically used to treat a deficiency in people who are unable to absorb adequate amounts of B12.

B12 is available as either oral tablets or prescription vitamin B12 injections, sometimes referred to as B12 shots. Is ...