ProByoMax™ Bullet*Please be advised that this product is shipped with a cold pack and appropriate arrangements should be made to get the package into refrigeration upon arrival to retain product quality. Unfortunately this product cannot be shipped internationally. Spore Based Probiotics & Butyrate Butyrate is a short chain fatty acid essential for optimal digestive health. Holistic health care advocates have been using butyrate in the form of an enema for many years