Yes, from reading a bit on their forums, it looks like reptiles have to have the right balances, so their owners have to know their stuff!
She definitely knows her stuff on this. She kept a green tree frog for double it's expected lifespan and her bearded dragon has laid three clutches of eggs this summer.
She's worried about calcium in regards to that, but if reptiles are anything like birds I figure that Isabella wouldn't be laying eggs if she weren't in optimum health.