You can chew it, swallow it, or take it as sublingual B12. These bioactive forms are superior to hydroxocobalamin or cyanocobalamin B12 1000mcg, as they are absorbed more efficiently by the body. B12 VEGETARIAN AND VEGAN TABLETS: A good vitamin B12 complex, with both types of active B12 forms, is suitable for vegans and vegetarians to boost their intake of B12.