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Supplementation is one of the most important — and most commonly misunderstood — aspects of amphibian care. Feeder insects alone do not provide a complete nutritional profile. Without regular calcium and vitamin dusting, amphibians are at risk of metabolic bone disease, vitamin A deficiency, and other preventable conditions. This guide covers the best calcium and vitamin supplements for amphibians in 2026.
Calcium vs Vitamins — What's the Difference?
- Calcium supplements correct the poor calcium-to-phosphorus ratio of most feeder insects. Most feeder insects are high in phosphorus and low in calcium, which over time depletes bone density. Calcium powder is dusted on feeders at most feedings.
- Vitamin supplements provide vitamin A, vitamin D3, and other micronutrients that feeder insects lack. Vitamin A deficiency is a common and serious problem in captive amphibians. Vitamin supplements are used less frequently than calcium — typically once or twice per week — because fat-soluble vitamins can accumulate to toxic levels if overdosed.
- Calcium with D3 combines calcium with vitamin D3, which is needed for calcium absorption. This is useful for amphibians kept without UVB lighting. For amphibians with access to appropriate UVB, plain calcium without D3 is used at most feedings, with D3 added less frequently.
Dusting Protocol
- Place feeder insects in a small bag or container with a pinch of supplement powder.
- Shake gently to coat the insects before offering them to your amphibian.
- Use plain calcium (without D3) at most feedings — typically every feeding or every other feeding.
- Use calcium with D3 or a multivitamin supplement 1-2 times per week.
- Do not over-supplement — a light dusting is sufficient. Heavy coating can deter feeding.
Best Calcium Supplements for Amphibians (2026)
Best Overall Calcium: Repashy Supercal NoD
Repashy Supercal NoD is a pure calcium supplement without vitamin D3, designed for use at most feedings alongside a separate D3 source. Fine powder that adheres well to feeder insects. Widely used by experienced amphibian and reptile keepers.
Best Calcium with D3: Zoo Med Repti Calcium with D3
Zoo Med Repti Calcium with D3 is the most widely available calcium supplement with added vitamin D3. Use 1-2 times per week for amphibians without UVB lighting, or less frequently for those with appropriate UVB. A reliable and affordable option available at most pet stores.
Best Vitamin Supplements for Amphibians (2026)
Best Overall Multivitamin: Repashy Supervite
Repashy Supervite is a comprehensive multivitamin supplement that includes vitamin A, vitamin D3, vitamin E, and a full range of micronutrients. It is one of the most complete vitamin supplements available for reptiles and amphibians and is widely recommended by experienced keepers. Use once or twice per week in rotation with plain calcium.
Best Budget Multivitamin: Zoo Med ReptiVite
Zoo Med ReptiVite is a widely available multivitamin supplement suitable for most amphibian species. Contains vitamin A, D3, and essential minerals. A reliable entry-level option for keepers who want a straightforward vitamin supplement without the premium price of Repashy products.
Supplementation Schedule by Species
| Species | Calcium (no D3) | Calcium with D3 or multivitamin |
| Pacman frog | Every feeding | 1-2x per week |
| White's tree frog | Every feeding | 1-2x per week |
| Fire-bellied toad | Every feeding | 1-2x per week |
| Tiger salamander | Every feeding | 1-2x per week |