Supplements & Calcium

Calcium with and without D3, multivitamins and gut-loading formulas.

Our approach

Why Trust ReptiNest?

ReptiNest helps gecko keepers find species-appropriate products without having to search through hundreds of options.

Our recommendations prioritize proper husbandry, product suitability, safety, value, reliability and the specific needs of each gecko species.

We compare product specifications, manufacturer information, established gecko care guidance and owner feedback before deciding which products to feature.

ReptiNest also breeds and sells geckos directly. Affiliate commissions never determine whether a product is recommended, and affiliate products are never presented as animals sold by ReptiNest.

Species-Specific

Recommendations are selected based on the needs of each gecko species.

Care First

Animal welfare and appropriate husbandry come before product commissions.

Product Comparison

We compare features, suitability, value and reliability before recommending products.

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Best Overall

Rep-Cal Calcium with D3 + Herptivite

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Rep-Cal Calcium with D3 + Herptivite

The classic dusting duo — phosphorus-free calcium with D3 plus a balanced multivitamin for rotation.

Best for: Preventing metabolic bone disease

Phosphorus-free formula
Ultra-fine powder sticks to feeders
Trusted for decades

$12–$20

Recommended for: Leopard Gecko

Our Pick

Zoo Med Repti Calcium without D3

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Zoo Med Repti Calcium without D3

Plain calcium for a constant in-tank dish — geckos self-regulate intake when UVB provides their D3.

Best for: UVB-kept geckos that self-dose

No D3 overdose risk with UVB
Fine powder, no phosphorus
Leave a pinch in a bottle cap

$8–$13

Recommended for: Leopard Gecko

Our Pick

Repashy Calcium Plus

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Repashy Calcium Plus

An all-in-one calcium and vitamin dust for the insects you feed alongside a complete diet.

Best for: Dusting feeder insects

All-in-one formula
Balanced D3 levels
Fine, even coating

$14–$20

Recommended for: Crested Gecko

Our Pick

Repashy Calcium Plus

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Repashy Calcium Plus

An all-in-one calcium and vitamin dust for the weekly feeder insects offered alongside the complete diet.

Best for: Dusting feeder insects

All-in-one formula
Balanced D3 levels
Fine, even coating

$14–$20

Recommended for: Gargoyle Gecko

Best Overall

Rep-Cal Calcium with D3 + Herptivite

Real product photo to be added

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Rep-Cal Calcium with D3 + Herptivite

A phosphorus-free calcium with D3 plus multivitamin rotation — tokays are heavy feeders and benefit from consistent supplementation of every insect meal.

Best for: Consistent calcium for a heavy feeder

Phosphorus-free formula
Sticks well to large feeders
Trusted for decades

$12–$20

Recommended for: Tokay Gecko

Best Overall

Rep-Cal Calcium with D3 + Herptivite

Real product photo to be added

supplements-calcium

Rep-Cal Calcium with D3 + Herptivite

A phosphorus-free calcium with D3 plus multivitamin — dust feeder insects regularly; day geckos' fast metabolism and egg-laying demand consistent calcium.

Best for: Consistent calcium for an active basker

Phosphorus-free formula
Fine powder sticks to feeders
Trusted for decades

$12–$20

Recommended for: Giant Day Gecko

Our Pick

Repashy Calcium Plus

Real product photo to be added

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Repashy Calcium Plus

An all-in-one calcium and vitamin dust for the weekly feeder insects offered alongside the complete diet — Leachianus are heavy feeders and benefit from consistent supplementation.

Best for: Dusting feeder insects

All-in-one formula
Balanced D3 levels
Fine, even coating

$14–$20

Recommended for: Leachianus Gecko

Best Overall

Rep-Cal Calcium with D3 + Herptivite

Real product photo to be added

supplements-calcium

Rep-Cal Calcium with D3 + Herptivite

The classic dusting duo — phosphorus-free calcium with D3 plus a balanced multivitamin for rotation, preventing metabolic bone disease.

Best for: Preventing metabolic bone disease

Phosphorus-free formula
Ultra-fine powder sticks to feeders
Trusted for decades

$12–$20

Recommended for: African Fat-Tailed Gecko