Instinct Raw Boost Freeze-Dried Mixers Multivitamin for Cats provides brain function support with fish oil & choline, and healthy heart support with the addition of taurine. A variety of fibers offers digestive support and pumpkin seeds offer metabolic support. Muscle support is provided from raw protein, and bone & joint function through calcium and phosphorus. Choline, B vitamins, and trace minerals support liver function and fish oil supports kidneys.