Nutritional yeast is not the same as regular yeast, or brewers yeast-- it actually must contain some part of its culture in it-- it has B12 and other B vitamins and a bunch of Amino Acids. I got some at Wild Oats. You can buy it on-line directly from Red Star if you have no health food stores in the area. Several companies make it including Red Star, and KAL. Look for Vegitarian Formula. Also look for non GMO, and Primarily Grown not a derivitive of the brewing industry (brewers yeast). I find it for 11-12 U.S. dollars. It makes a great hot drink, and is good to add to soups and stocks (but since it is high cost, you need to watch it).