The Complete Package for Digestive Support! Probiotics, Prebiotics, Active Yeast plus Yeast Culture! HorseTech's GutWerks supplement offers a super-concentrated boost of our popular probiotic/prebiotic package along with premium quality yeast culture and live cell yeast! Each two (2) ounce serving (57 grams) of Gut Werks will provide over 20 billion CFU of live, naturally-occurring, beneficial microorganisms and 50 billion live Saccharomyces cerevisiae yeast cells. GutWerks also includes our prebiotic package (mannanoligosaccharides and fructooligosaccharides), all on a super-palatable Diamond V yeast culture base. GutWerks may also be used at a one (1) ounce per day rate where lower levels of support are indicated. Our probiotics, prebiotics and live yeast cultures have been selected for performance, viability and stability when mixed in feed--they'll be there when you need them.