DOUGLAS LABS - Liquid B12 (Methylcobalamin) - 30 Millilitre(s) - NPN: 80001532 -- Methylcobalamin Liquid B12 provides 1,000 mcg of highly bioavailable vitamin B12 in a tasty and convenient natural cherry-flavoured liquid. Vitamin B12 is essential for the metabolism of nutrients. As a cofactor for methylmalonyl-CoA mutase enzymes, vitam