CellularActive Vegan Dietary Supplement Gluten Free Bluebonnet's Liquid CellularActive Methylcobalamin Vitamin B12 1000 mcg provides fast-acting vitamin B12 as methylcobalamin, a coenzyme form of B12, which may be better utilized and better retained in the body. Available in a naturally delicious liquid form for maximum assimilation and absorption.Bluebonnet Nutrition