Rep-cal phosphorous-free fine powder is an excellent source of calcium for all reptiles and amphibians. Scientifically formulated from 100-Percent natural oyster shell phosphorous-free calcium carbonate with added vitamin D3 to aid in the absorption of calcium. We ask that you mix rep-cal with vitamin supplement herptivite. If we premixed the products, the 'beadlets' of beta carotene in herptivite may possibly be damaged during manufacturing by the calcium in rep-cal. Mix with vegetables, fruits and pastes approximately 1/2-tablespoon rep-cal with 1/2-tablespoon herptivite per-pounds of food. Thoroughly mix a 1:1 ratio of rep-cal and herptivite in a plastic bag. Place insects in the bag. Shake slowly until they are completely covered. No other supplementation is required. Available in 5.5-Ounce size.