How can Vitamin D3 be supplied to a captive Blue Iguana if it cannot synthesize enough through light?

Answer

Through diet or dusting powders

If the animal cannot synthesize sufficient Vitamin D3 through UVB lighting exposure, it must be supplied via the diet or through dusting powders.

How can Vitamin D3 be supplied to a captive Blue Iguana if it cannot synthesize enough through light?
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