No, it's made from ingredients that you would find naturally in food, so it won't cause OD. That's why most nutritionists will say that it is better to eat foods rich in vitamins and minerals your body needs rather than taking supplements because the vitamins and minerals you get from foods will just get worked out of your system if there are too much unlike most multivitamin tablets which will cause OD if taken too much. You can use other brand, but you can't use as much as the Dragon Dust. Feeder insect have lousy calcium to phosphorous ratio and don't have all the nutrient your beardie needs, so that is why it suggested to dust everday to balance out the nutritional value. With other supplement you may need to cut back on the number of days you actually dust, but you still need to dust the preys lightly with calcium about 5 times a week and lightly with multivitamin 2-3 times a week. Another important thing you need to do is the gutload your feeder insects with nutritious food so when your bearded dragon eat them, they will get some those food, too, and it improves the nutritional value of the preys.

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