Vitamin B12 lozenges are a great tasting, high dose vitamin B12 product. Each berry flavored lozenge contains 5000 mcg methylcobalamin, a naturally occurring, highly bioavailable form of vitamin B12. They are designed to deliver B12 through the mucous membranes in order to bypass the need for intrinsic factor, a protein produced in the stomach that is necessary for maximal GI absorption of B12. Vitamin B12 in supplement form also reduces the need for stomach acid, which is typically required to separate food-derived B12 from food proteins.