Since 1947 Active Coenzyme form of B12 Suitable for Vegans Kosher Parve Dietary SupplementMethylcobalamin is the active, coenzyme from of Vitamin B12. While the body can readily absorb Vitamin B12 as cobalamin, it must further convert it to a coenzyme form, methylcobalamin, to become metabolically active. In this form, it is bioidentical to the predominant and active form found in the body. The "body-ready" Vitamin B12 in this formula is offered in a convenient nugget dosage from which is also suitable for vegan.