T-Rex Uromastyx Dust is a salad topper calcium supplement with added vitamins and minerals. If you're feeding your Uromastyx veggies, there is no need for using a variety of different supplements. Just sprinkle this dust onto the veggies before feeding, and combined with the dietary value of the veggies, Uromastyx Dust will complete the vitamin, nutrient, mineral and trace-element requirements for your pet's feeding needs. Bottle is 1.75oz