Hi, I used to keep and breed Leopard geckos. When I got my first gecko, the pet store told me I needed to buy a bunch of expensive vitamins, and not knowing any better, I did just that. After about six years of keeping the wonderful critters, I learned more about them and thought "why not do it naturally?" so I bred my own superworms, waxworms, mealworms, crickets, and mice and fed them homegrown, high calcium foods (romain lettuce, beets, carrots, and radishes) and I fed the insects to the lizards, after that I never supplemented again, and havent experienced any adverse effects. It pays to learn about the animal and how it takes care of itself in the wild, try to mimic certain things, it helps. I hope my speech helps in some way.......lol