Described by the makers as a double-edged probiotic, this certainly contains a wide range of probiotics & is widely used by vets. It is specifically made for equines Probiotic based on saccharomyces yeast. Ingredients: Saccaromyces spp, Allin concentrate, Enterococcus faecium, Streptococcus spp, Lactobacillus Casei, Lactobacillus acidophillus, Pediococcus pentosaceus.