Doctor's Best Fully Active B12 supports healthy memory, mood, and energy. Fully Active B12 provides methylcobalamin, the most biochemically active form of vitamin B12. A diet of healthy whole foods may be rich in most vitamins, but B12 is the only nutrient that can't be supplied from a plant-based lifestyle alone. Available naturally in animal sources, Vitamin B12 plays an important role in supporting the metabolic activity of the brain and nervous system. Doctor's Best created a 100% vegan option that maximizes absorption without compromising preference, lifestyle or wellness routines. Doctor's Best Fully Active B12 is gluten free, non-GMO, vegan, and soy free.