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Ingredient

Vitamin B12

Strong

An essential vitamin involved in red blood cell formation and energy metabolism.

How it works

Cofactor for methylmalonyl-CoA mutase and methionine synthase; deficiency is common in older adults and those on plant-based diets.

Evidence

Pharmacopoeia-grade evidence for adequacy; methylcobalamin or cyanocobalamin both studied.

Studies

Smith et al., Annu Rev Nutr, 2018
Reviews B12 status and supplementation in vegetarians and older adults.
PubMed 29400994 ↗

One ingredient, one study, one product worth your money.

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Vitamin B12

How it works

Evidence

Studies

Top products

Now Foods B12 1000 mg

Nature Made B12 1000 mg

One ingredient, one study, one product worth your money.