Transvite Excel probiotic powder contains 3,500 million viable natural saccharomyces cerevisiae organisms per 1g which help supply a healthy balance of micro-organisms in the gut during periods of stress. It also contains the prebioticfFructo oligosaccharide which is a food substrate for beneficial bacteria in the hind gut. Saccharomyces cerevisiae (NCYC Sc47) is an approved micro-organism for use as a feed additive in equine nutrition in accordance with regulation (EC) 186/2007.Ideal for horses with hind gut issues, off feed, losing condition and stressed. Help ease the acid with this superb quality gut balancer that is upwards of 350% stronger than leading competitor brands. Available in 1.5kg tub which lasts 60 doses for 500kg horse and 9kg tub which lasts 540 doses for 500kg horse.