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Top 5 Calcium + Vitamin D Fortified Supplements for Reptile & Amphibian Feeding in Canada (2025) — Vet-Informed Picks to Prevent Metabolic Bone Disease

Published on Thursday, August 21, 2025

Calcium supplements fortified with vitamin D3 or D2 are essential tools for reptile and amphibian keepers who want to support calcium absorption, skeletal health, and normal growth. In Canada, hobbyists and professional caretakers choose fortified formulations because they reflect current research on dosing and photobiology, reduce metabolic bone disease risk, and provide repeatable, measurable supplementation options. Consumers in this market prioritize lab-tested products, clear dosing instructions, compatibility with common feeder insects and diets, and formulations (powder, granular, or paste) that fit their animal’s life stage and UVB exposure. Availability through Canadian retailers, transparent ingredient lists, and vet or herpetologist endorsements are also frequent purchase drivers.

Quick Menu

1. Best Balanced D3 Supplement

2. Best Widely Available Brand

3. Best Fine Powder Consistency

4. Best Budget Fortifier

5. Best Complete Calcium Blend

1
BEST BALANCED D3 SUPPLEMENT

Rep-Cal Calcium with Vitamin D3

Rep-Cal

Rep-Cal's Calcium with Vitamin D3 is widely regarded as a market-leading, cost-effective dusting powder for calcium supplementation in reptile and amphibian feeding thanks to its consistent particle size and straightforward Ca+D3 formulation. It holds an edge on value and broad applicability compared with premium or niche blends on this list, offering dependable bioavailable calcium with minimal additives for keepers who prioritize predictable dosing and lower per-dose cost.

4.5
★★★★☆

  • D3 fortified

  • Fine powder

  • D3 fortified

  • Fine powder

Review Summary

90%

"Well-regarded for a consistent fine powder and reliable D3 dosing; users report good dusting performance and sustained results, though some note occasional clumping in very humid conditions."

  • Sun-kissed boost

  • Contains Vitamin D3 to aid calcium absorption

  • Sun-kissed boost

  • Contains Vitamin D3 to aid calcium absorption

Increased Safety & Security

Time-Saving Convenience

Rep-Cal's Calcium with Vitamin D3 is widely regarded as a market-leading, cost-effective dusting powder for calcium supplementation in reptile and amphibian feeding thanks to its consistent particle size and straightforward Ca+D3 formulation. It holds an edge on value and broad applicability compared with premium or niche blends on this list, offering dependable bioavailable calcium with minimal additives for keepers who prioritize predictable dosing and lower per-dose cost.

  • D3 fortified

  • Fine powder

  • Sun-kissed boost

  • Contains Vitamin D3 to aid calcium absorption

  • Fine dusting powder ideal for gut-loaded feeders

  • D3 fortified

  • Fine powder

  • Sun-kissed boost

  • Contains Vitamin D3 to aid calcium absorption

  • Fine dusting powder ideal for gut-loaded feeders

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From 33.64$
2
BEST WIDELY AVAILABLE BRAND

Zoo Med Repti Calcium with D3

Zoo Med

Zoo Med Repti Calcium with D3 is a highly available, retail-friendly option prized for its consistent manufacturing and clear labeling aimed at hobbyists and first-time keepers supplementing reptiles and amphibians. While often priced slightly higher than economy powders, its wide distribution and quality control make it a convenient choice compared with lab-focused or specialty brands, and its fine powder form suits a broad range of feeders and feeder insects.

4.4
★★★★☆

  • High bioavailability

  • Clump-free powder

  • High bioavailability

  • Clump-free powder

Review Summary

88%

"Popular, easy-to-use supplement praised for consistent D3 content and effectiveness over time; a few users prefer a finer grind but overall long-term results are commonly reported."

  • Beardie grin

  • Fortified with D3 for improved bone health

  • Beardie grin

  • Fortified with D3 for improved bone health

Increased Safety & Security

Time-Saving Convenience

Zoo Med Repti Calcium with D3 is a highly available, retail-friendly option prized for its consistent manufacturing and clear labeling aimed at hobbyists and first-time keepers supplementing reptiles and amphibians. While often priced slightly higher than economy powders, its wide distribution and quality control make it a convenient choice compared with lab-focused or specialty brands, and its fine powder form suits a broad range of feeders and feeder insects.

  • High bioavailability

  • Clump-free powder

  • Beardie grin

  • Fortified with D3 for improved bone health

  • Light, clinging powder suitable for insects and greens

  • High bioavailability

  • Clump-free powder

  • Beardie grin

  • Fortified with D3 for improved bone health

  • Light, clinging powder suitable for insects and greens

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From 22.99$
3
BEST FINE POWDER CONSISTENCY

Exo Terra Calcium + D3 Powder

Exo Terra
🏠 Local Product

Exo Terra Calcium + D3 Powder presents a premium, terrarium-oriented formula that appeals to keepers managing complex vivaria and amphibian species that need careful micronutrient delivery. Compared with simpler calcium products on this list, Exo Terra emphasizes formulation and packaging designed for precise dosing in planted or high-humidity enclosures, trading a somewhat higher price for product presentation and targeted use.

4.3
★★★★☆

  • Balanced ratio

  • Fast absorption

  • Balanced ratio

  • Fast absorption

Review Summary

85%

"Solid, affordable option with effective D3 fortification; reviews mention mixed powder texture and occasional packaging issues but generally reliable for regular use."

  • Terrarium-ready wink

  • Very fine texture that adheres well to small feeders

  • Terrarium-ready wink

  • Very fine texture that adheres well to small feeders

Increased Safety & Security

Skill Development & Mastery

Exo Terra Calcium + D3 Powder presents a premium, terrarium-oriented formula that appeals to keepers managing complex vivaria and amphibian species that need careful micronutrient delivery. Compared with simpler calcium products on this list, Exo Terra emphasizes formulation and packaging designed for precise dosing in planted or high-humidity enclosures, trading a somewhat higher price for product presentation and targeted use.

  • Balanced ratio

  • Fast absorption

  • Terrarium-ready wink

  • Very fine texture that adheres well to small feeders

  • Contains Vitamin D3 to support calcium metabolism

  • Balanced ratio

  • Fast absorption

  • Terrarium-ready wink

  • Very fine texture that adheres well to small feeders

  • Contains Vitamin D3 to support calcium metabolism

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From 9.49$
4
BEST BUDGET FORTIFIER

Fluker's Calcium with Vitamin D3

Fluker's

Fluker's Calcium with Vitamin D3 is positioned as a budget-conscious, high-volume option that gives breeders and high-usage keepers a low cost-per-gram solution for routine calcium fortification in reptile and amphibian feeding. It competes on price against market leaders while still providing a stabilized D3 addition, making it the practical choice where quantity and affordability matter more than niche additives or premium branding.

4.1
★★★★☆

  • Budget friendly

  • Easy scoop

  • Budget friendly

  • Easy scoop

Review Summary

82%

"Budget-friendly and commonly used, though some experienced keepers report variable clumping and uneven dosing; most buyers still find it effective for routine supplementation."

  • Gator-approved smirk

  • Economical option with added Vitamin D3

  • Gator-approved smirk

  • Economical option with added Vitamin D3

Increased Safety & Security

Time-Saving Convenience

Fluker's Calcium with Vitamin D3 is positioned as a budget-conscious, high-volume option that gives breeders and high-usage keepers a low cost-per-gram solution for routine calcium fortification in reptile and amphibian feeding. It competes on price against market leaders while still providing a stabilized D3 addition, making it the practical choice where quantity and affordability matter more than niche additives or premium branding.

  • Budget friendly

  • Easy scoop

  • Gator-approved smirk

  • Economical option with added Vitamin D3

  • Popular for routine dusting of feeder insects

  • Budget friendly

  • Easy scoop

  • Gator-approved smirk

  • Economical option with added Vitamin D3

  • Popular for routine dusting of feeder insects

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From 12.99$
5
BEST COMPLETE CALCIUM BLEND

Repashy Calcium Plus

Repashy

Repashy Calcium Plus is a specialty fortified blend that combines calcium and vitamin D with complementary minerals to support sensitive amphibians and insectivorous reptiles that benefit from a more complete micronutrient profile. Unlike single-ingredient powders, Repashy's product is formulated to reduce the need for multiple separate supplements, offering technical advantages in bioavailability and tailored nutrient balance at a premium price point compared with basic Ca+D3 dusts.

4.6
★★★★☆

  • Chelated calcium

  • Mixes easy

  • Chelated calcium

  • Mixes easy

Review Summary

92%

"Highly rated for formulation consistency and visible long-term benefits; pricier than basic powders but many users report improved animal health and consider it worth the cost."

  • Frog-approved shimmy

  • Formulated as a more comprehensive calcium-plus supplement

  • Frog-approved shimmy

  • Formulated as a more comprehensive calcium-plus supplement

Increased Safety & Security

Skill Development & Mastery

Repashy Calcium Plus is a specialty fortified blend that combines calcium and vitamin D with complementary minerals to support sensitive amphibians and insectivorous reptiles that benefit from a more complete micronutrient profile. Unlike single-ingredient powders, Repashy's product is formulated to reduce the need for multiple separate supplements, offering technical advantages in bioavailability and tailored nutrient balance at a premium price point compared with basic Ca+D3 dusts.

  • Chelated calcium

  • Mixes easy

  • Frog-approved shimmy

  • Formulated as a more comprehensive calcium-plus supplement

  • Includes Vitamin D3 and additional trace minerals

  • Chelated calcium

  • Mixes easy

  • Frog-approved shimmy

  • Formulated as a more comprehensive calcium-plus supplement

  • Includes Vitamin D3 and additional trace minerals

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From 34.95$

What the Research and Veterinary Guidance Say

Scientific studies and veterinary consensus emphasize two complementary strategies to maintain healthy calcium metabolism in reptiles and amphibians: adequate dietary calcium (including fortified supplements) and appropriate UVB/photobiology to enable vitamin D synthesis. While vitamin D3 supplementation can safely improve calcium uptake when UVB exposure is limited, balanced dosing and product quality are important because excessive vitamin D can cause toxicity. Canadian keepers commonly combine measured supplement dusting or gut-loading of feeders with habitat UVB that matches species-specific needs. Many veterinarians and herpetology experts recommend following established dosing ranges, choosing reputable brands with batch testing, and consulting a reptile or amphibian veterinarian for long-term plans.

Vitamin D3 is biologically active in most reptiles and amphibians and enhances intestinal calcium absorption; when UVB is absent or insufficient, dietary D3 fortification can reduce the risk of calcium deficiency.

Photobiology studies indicate that UVB exposure and dietary sources of vitamin D jointly determine overall vitamin D status; relying exclusively on one approach can be risky for some species.

Research and clinical reports link inadequate calcium or vitamin D (and inconsistent UVB) to metabolic bone disease (MBD), which is preventable with appropriate husbandry and supplementation.

Excessive or infrequent high-dose D3 can cause hypercalcemia and long-term organ damage; follow label dosing, prefer regular low-dose products, and seek veterinary testing if in doubt.

Studies underline the value of measured, repeatable supplementation methods—powders for dusting, quantified paste doses, and documented gut-loading protocols—to maintain consistent calcium intake.

Regulatory oversight for pet supplements varies; prioritize products with third-party testing, clear nutrition panels, and positive clinical or practitioner endorsements.

In the Canadian context, the five formulations covered here — Rep-Cal Calcium with Vitamin D3, Zoo Med Repti Calcium with D3, Exo Terra Calcium + D3 Powder, Fluker's Calcium with Vitamin D3, and Repashy Calcium Plus — represent the most accessible, research-aligned options for 2025. Each suits different husbandry styles (powder dusting, paste application, or highly bioavailable blends), but for a balance of lab transparency, steady low-dose vitamin D3, broad species compatibility, and Canada-wide availability, Rep-Cal Calcium with Vitamin D3 is the best overall choice among these five for many keepers. We hope you found what you were looking for — if you want to narrow results by species, life stage, UVB setup, or retailer in Canada, refine or expand your search using the site search or category filters.

Discover More
  • Powdered Calcium Supplements for Reptile and Amphibian Feeding
  • Liquid Mineral Supplements for Reptile and Amphibian Feeding
  • Chelated Mineral Supplements for Reptile and Amphibian Feeding
  • Nano and Micro Particulate Calcium for Reptile and Amphibian Feeding
  • Trace Mineral Mixes for Reptile and Amphibian Feeding

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