Vetark Nutrobal is a multivitamin supplement specifically formulated to assist in correcting the inadequate levels of calcium present in live insectivorous foods such as crickets & mealworms. The Calcium to Phosphorus ratio is very important in ensuring healthy bone growth. It is particularly important for those species fed primarily on insects such as mealworms or locusts. Nutrobal is ideal for this, used as a dusting powder.