Calcium powder with D3: How Leopard Geckos Use It
Frequency
Every feeding (juveniles) / every other feeding (adults)
Role
Primary defence against Metabolic Bone Disease. Dust feeders lightly immediately before offering — D3 content should not exceed 45,000–50,000 IU/kg or overdose becomes a risk. Repashy Calcium Plus and Zoo Med Reptivite with D3 are both well-regarded all-in-one options with a correct 2:1 Ca:P ratio.
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Plain calcium (no D3) is used always available in a small open dish. Many geckos self-regulate calcium intake by licking a small dish voluntarily.
Multivitamin powder is used once per week maximum. Provides vitamins A, B complex, and E that are not present in sufficient quantities in feeder insects even with gut-loading.
D3 adjustment if using UVB is used reduce d3 supplementation accordingly. Leopard geckos are crepuscular and get limited UV exposure naturally, but captive geckos with proper UVB lighting (5–7% UVB, 10–12 hours/day) will synthesise D3 through their skin.