foxymiche the nutrobal is used as a vitamin supplement not a calcium supplement, you need to get a pure calcium supplement i use something called calypso that i dust with 5 days a week then i dust with a vitamin supplement without D3 at weekends, then one weekend per month ill use nutrabol as it has D3 . im still learning but from what ive read and some1 correct me if im wrong if the reptile has too much D3 it will stop the absorbtion of calcium into the system, so you only want to use it every now and again.