# Best Calcium and Supplements for Reptiles Source: https://terrariumnest.com/best/best-calcium-and-supplements Updated: 2026-10-06 Publisher: Terrarium Nest. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://terrariumnest.com/how-we-research#our-score Captive diets rarely match what an animal would eat in the wild, so most keepers dust feeders with calcium and a multivitamin. Needs vary a lot by species, age and lighting. An animal under good UVB has different requirements than one without, and growing or breeding animals differ again. What varies in the products themselves is formulation, particle size and how well the powder actually clings to a feeder insect. We weighed how finely each powder is milled, how well it sticks to insects, packaging that keeps moisture out, and clear labelling of what is included. Plain calcium suits routine dusting, calcium with D3 and multivitamin blends suit particular setups, and liquid or paste forms suit picky feeders. We give no dosing advice here. Follow a current care sheet for your species or ask an exotics vet. ## Picks ### 1. Zoo Med Reptile Calcium with Vitamin D3, 8-Ounce Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) Zoo Med Reptile Calcium with Vitamin D3 in an 8-Ounce container, a dusting powder for feeder insects. Pros: - Calcium with D3 supports bone health in reptiles kept indoors - 8-Ounce size lasts a long time for one or two animals - Zoo Med supplement is a common vet-recommended style of product Cons: - Overusing D3 products can be harmful, so follow a dusting schedule - Pets with strong UVB may need a plain calcium for some feedings Details: https://terrariumnest.com/product/B000UJSUO4 ### 2. Rep-Cal SRP00200 Phosphorous-Free Calcium Ultrafine Powder Reptile/Amphibian Supplement with Vitamin D3 Our score: 8.5/10 (Fit for the job 10/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Rep-Cal phosphorous-free calcium ultrafine powder with Vitamin D3, a long-trusted reptile and amphibian supplement. Pros: - Rep-Cal is a long-standing name among reptile keepers - Ultrafine powder coats crickets and roaches evenly with a light shake - Phosphorous-free formula suits most insect-eating species Cons: - Check the container size before ordering - D3 version is best rotated with plain calcium as advised by a vet Details: https://terrariumnest.com/product/B07MDXV8TR ### 3. Nekton Rep-Calcium+ D3 Reptile Supplement 130 gm (4.56 oz) Our score: 8.4/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Nekton Rep-Calcium+ D3 reptile supplement in a 130 gm (4.56 oz) tub, a calcium powder with vitamin D3 for dusting feeder insects. Pros: - 130 gm tub gives a generous supply for several insect-eating pets - Combined calcium and D3 supports indoor reptiles with limited sun - Nekton is a long-running specialist in animal supplements Cons: - D3 formula should be rotated with plain calcium to avoid oversupplementing - Harder to find in local US pet stores than Zoo Med or Rep-Cal Details: https://terrariumnest.com/product/B0BXTZLK2C ### 4. Herptivite Multivitamin for Reptiles and Amphibians, 3.3 oz Blue Bottle Our score: 8.1/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Herptivite multivitamin for reptiles and amphibians in a 3.3 oz blue bottle, a vitamin powder to rotate with calcium. Pros: - Adds vitamins that feeder insects alone may lack - Pairs with Rep-Cal calcium in a common rotation schedule - 3.3 oz bottle lasts a long time at occasional use Cons: - Not a calcium source, so a separate calcium powder is still needed - Should be used on a schedule rather than every feeding Details: https://terrariumnest.com/product/B00076HT3S ### 5. Exo Terra Calcium Powder Supplement for Reptiles and Amphibians, 3.2 Oz. Our score: 7.5/10 (Fit for the job 8/10 · Features and specs 6/10 · Build and materials 7/10 · Value 9/10) Exo Terra ultra-fine calcium powder in a 3.2 oz container, described as high in calcium and low in phosphorus. Used by coating insects or mixing with fruits and vegetables. The title does not mention vitamin D3, unlike the Calcium + D3 version. Pros: - Ultra-fine powder, which the listing says is for coating insects or mixing into fruits and vegetables - Described as high in calcium and low in phosphorus, in a 3.2 oz container at a low price - Exo Terra recommends it in combination with its Multi Vitamin Powder, so the two are meant to work as a pair Cons: - The product page does not state whether vitamin D3 is included, so read the label before relying on it for D3 - No ingredient list or calcium percentage is given on the product page, and amounts are left to the feeding instructions Details: https://terrariumnest.com/product/B001B57IM6 ### 6. Fluker's Calcium to Phosphorus Reptile Dietary Supplement, 4 oz Our score: 7.3/10 (Fit for the job 8/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10) Fluker's Calcium to Phosphorus reptile dietary supplement in a 4 oz container for balancing insect diets. Pros: - Formulated around balancing calcium and phosphorus ratios - 4 oz container is a practical size for one or two pets - Fluker's supplements are easy to buy locally Cons: - Check whether this supplement includes vitamin D3 - Label reading is needed to fit it into a full supplement schedule Details: https://terrariumnest.com/product/B0002DHPM6 ### 7. Zilla Calcium Supplement Spray, 8 oz Our score: 7.0/10 (Fit for the job 7/10 · Features and specs 7/10 · Build and materials 7/10 · Value 7/10) Zilla's calcium supplement spray at 8 oz, a liquid alternative to powder for coating greens and insects. Pros: - Spray coats salads evenly without clumping - Less airborne dust than powder supplements - 8 oz bottle covers many salad and insect feedings for one pet Cons: - Liquid runs off smooth insects more than fine powder - Wet coating can make crickets clump or escape the bowl Details: https://terrariumnest.com/product/B004LO7MNO As an Amazon Associate I earn from qualifying purchases.