These microorganisms are grown on a sterilized semi-solid medium specifically for use in animal feed and are designated Primary Total Fermentation Products. They are not by-products or residues of some fermentation process, hence the name Primary. Total means that the entire growth medium is harvested, not just the microbial cells, Live Yeast, Probiotics and enzymes, etc. Therefore, PRO-VITAL’S LIVESTOCK REFORMER contains all the microbial cells and enzymes that have been produced and the final Fermentation Product is not just a few microbial cells on a large amount of inert carrier as is common in a variety of competing direct-fed microbial products being sold.