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ENHANCED IMMUNE FUNCTION: B12 plays a vital role in maintaining a healthy immune system, helping to protect you from illness and disease

As a cofactor, cobalamins are essential for two cellular reactions: the mitochondrial methylmalonyl-CoA mutase conversion of methylmalonic acid (MMA) to succinate, which links lipid and carbohydrate metabolism, and the activation of methionine synthase, which is the rate-limiting step in the synthesis of methionine from homocysteine and 5-methyltetrahydrofolate

And as discussed below, NAD+ is not recommended for women who are pregnant or breastfeeding

For this reason, those eating a vegetarian or a vegan diet are more prone to B12 deficiency