Gecko fact

Low-level UVB improves health even though leos were kept without it for decades

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Quick answer: Leopard geckos were historically kept without UVB by supplementing D3 in calcium powder.

Leopard geckos were historically kept without UVB by supplementing D3 in calcium powder. Research since 2018 shows crepuscular geckos do encounter UV naturally and benefit from low-level exposure. UVB allows natural D3 synthesis and may improve immune function. Not strictly required but increasingly recommended.

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