Nature Zone SNZ54113 Reptile Essential Probiotics, 2.8-Ounce Essential probiotic bacteria and natural vitamins and minerals Treatment with any oral antibiotic can kill the beneficial bacteria that are naturally present Beneficial bacteria can account for as much as 40-percent of the food elements absorbed during digestion Essential probiotic helps fills the gap in your reptile's diet Comes in 2-4/5-ounce bottle