Best Vitamins for Breeding Leopard Geckos (2026)

Breeding leopard geckos places nutritional demands on females that non-breeding husbandry simply does not. A female producing eggs depletes calcium reserves at a rate that standard alternating-day supplementation cannot keep up with. The result, without intervention, is metabolic bone disease — the single most preventable serious illness in captive reptiles.

This guide covers the six supplements that matter most for breeding leopard geckos, the science behind each nutrient, and the exact protocol breeders use to keep gravid females healthy through multiple clutches.

Quick Comparison Table

Detailed Reviews

Repashy Calcium Plus — Best Overall

Repashy Calcium Plus has become the default supplement in leopard gecko breeding communities for one reason: it works and it is simple. Calcium, D3, preformed vitamin A (retinol), B-complex, vitamin E, and a complete trace mineral profile — all in one jar.

For breeders managing 10, 20, or 50+ animals through a season, the logistics of separate calcium, D3, and vitamin products multiply fast. Repashy Calcium Plus eliminates that entirely. Dust every feeding, one product, done.

The D3 level is calibrated for insectivorous reptiles without UVB access — the most common leopard gecko setup. The retinol-based vitamin A bypasses the beta-carotene conversion problem entirely (more on that below). And the fine powder adheres to crickets and dubia without clumping or falling off during the feeding response.

Pro Tip: If you breed leopard geckos and use Repashy Calcium Plus, do not add any other supplement that contains D3 or vitamin A. The all-in-one formula already delivers both at calibrated levels. Stacking creates overdose risk.

Arcadia EarthPro-A — Premium Pick

The Arcadia EarthPro-A is a dedicated vitamin A supplement built on preformed retinol — not beta-carotene. This single difference makes it one of the most important supplements for leopard gecko breeders who want granular control over their supplementation protocol.

Leopard geckos are insectivores that convert beta-carotene to retinol poorly, if at all. Most multivitamins list beta-carotene as their vitamin A source. Arcadia EarthPro-A uses retinol directly, ensuring the gecko actually absorbs and utilizes the vitamin A it receives.

As part of Arcadia's modular EarthPro system, it is designed to be rotated alongside Arcadia EarthPro CalciumPro Mg (calcium + magnesium) and Revitalise D3 (vitamin D3). This modularity lets breeders increase calcium frequency for gravid females without simultaneously increasing D3 or vitamin A — a flexibility that all-in-one products cannot offer.

Cons: The modular system means three separate purchases. Total cost runs $30–$45 for the complete set, versus $8–$15 for Repashy Calcium Plus. The trade-off is precision versus simplicity.

Zoo Med Repti Calcium with D3 — Best Value

At $5–$8 per jar, Zoo Med Repti Calcium with D3 is the most affordable calcium supplement with D3 on the market. Pharmaceutical-grade calcium carbonate, optimized D3 levels, available at every PetSmart, Petco, and online retailer.

For breeders, the value proposition is straightforward: daily calcium supplementation during the breeding season burns through product fast. Zoo Med Repti Calcium with D3 keeps per-feeding costs low without compromising on calcium quality.

The critical caveat: this product contains no vitamin A, no B-complex vitamins, and no trace minerals beyond calcium and D3. It is a calcium supplement, not a multivitamin. Breeding females need both.

Pair it with: Repashy SuperVite (1–2 times per week) for complete vitamin coverage without D3 stacking.

Pro Tip: Keep a shallow dish of plain calcium powder (no D3) available in every breeding female's enclosure 24/7. Gravid females will self-regulate calcium intake between feedings. This free-choice calcium dish is in addition to regular dusting — not a replacement for it.

Repashy SuperVite — Best Vitamin-Only Supplement

Repashy SuperVite fills a specific niche: pure vitamins without calcium or D3. For breeders who already use a dedicated calcium powder like Zoo Med Repti Calcium with D3, adding a vitamin supplement that also contains calcium and D3 creates stacking risk. Repashy SuperVite eliminates that concern entirely.

The formula includes preformed vitamin A (retinol), B-complex vitamins, vitamin E, carotenoids, and trace minerals. The retinol is the headline feature — it bypasses the beta-carotene conversion bottleneck that makes most multivitamins partially ineffective for leopard geckos.

During breeding season, use Repashy SuperVite 1–2 times per week alongside daily calcium dusting. The vitamin E and B-complex support egg production, while retinol addresses the vitamin A needs that calcium-only products miss.

Zoo Med Reptivite with D3 — Best All-Rounder

Zoo Med Reptivite with D3 is a complete multivitamin that tries to cover every base: calcium, D3, vitamin A, amino acids, and trace minerals in one product. It largely succeeds — with one significant caveat.

The vitamin A in Zoo Med Reptivite with D3 is provided as beta-carotene. Leopard geckos convert beta-carotene to retinol inefficiently, meaning the vitamin A listed on the label may not translate to actual vitamin A absorption. For non-breeding geckos on a varied diet, this is manageable. For gravid females with elevated vitamin A demands, the beta-carotene limitation becomes a real concern.

That said, at $6–$10, the overall nutrient profile provides decent coverage for breeders who want a single, affordable product. If budget is the primary constraint and you are supplementing at every feeding, Zoo Med Reptivite with D3 delivers acceptable results for most breeding programs.

Upgrade path: If you notice signs of vitamin A deficiency in breeding females (stuck shed, eye issues, reduced clutch viability), switch the vitamin component to a retinol-based product like Arcadia EarthPro-A or Repashy SuperVite.

Arcadia EarthPro CalciumPro Mg — Premium Calcium

The Arcadia EarthPro CalciumPro Mg adds something most calcium powders miss: magnesium. Magnesium is a direct cofactor in calcium absorption at the intestinal level. It also plays a role in muscle contraction — relevant for egg-laying females that rely on smooth muscle function during oviposition.

As part of the Arcadia EarthPro modular system, it is designed to be used at every insect feeding alongside rotating applications of Arcadia EarthPro-A (vitamins) and Revitalise D3. The fine-milled powder adheres well to feeder insects with minimal waste.

For breeders already invested in the Arcadia system, Arcadia EarthPro CalciumPro Mg is the logical calcium choice. For everyone else, the practical benefit of added magnesium — while scientifically valid — may not justify the premium over Zoo Med Repti Calcium with D3 at twice the price.

Breeding Supplement Protocol: When and How Much

Breeding leopard geckos require a fundamentally different supplementation schedule than non-breeding animals. The standard alternating-day calcium protocol does not provide enough calcium for egg production.

The Breeding Rule: Every Feeding Gets Calcium

Non-breeding adult leopard geckos typically receive calcium dusting every other feeding, with a multivitamin once per week. Breeding females need calcium at every single feeding — no skipping, no alternating.

Gravid female protocol:

• Every feeding: Dust all feeder insects with calcium + D3 (or all-in-one like Repashy Calcium Plus)
• 1–2 times per week: Add a multivitamin dusting (Repashy SuperVite or similar) if not using an all-in-one
• 24/7 availability: Plain calcium dish (no D3) always accessible in the enclosure
• Pre-breeding boost: Begin daily supplementation 2–4 weeks before introducing males

The Free-Choice Calcium Dish

A shallow dish of pure calcium carbonate (no D3, no vitamins) should sit in every breeding female's enclosure at all times. Gravid females self-regulate calcium intake and will lick from the dish when their body signals a need.

This is not optional. Breeders consistently report that females increase calcium dish usage dramatically during egg development. The dish provides a safety net between scheduled feedings.

Important: The free-choice dish must contain plain calcium only — no D3. D3 in an ad-libitum dish creates overdose risk because you cannot control how much the gecko consumes. The D3 comes from scheduled dustings only.

Post-Laying Recovery

After each clutch, females need 2–3 weeks of intensified feeding and supplementation before being bred again. Continue the every-feeding calcium protocol. Offer extra feeder insects (5–7 appropriately sized insects per feeding instead of the usual 3–5). Monitor weight closely — a female that drops below her pre-breeding weight should not be bred for another cycle.

The Vitamin A Problem: Retinol vs. Beta-Carotene

Vitamin A is the most misunderstood nutrient in leopard gecko supplementation. Most reptile multivitamins list beta-carotene as their vitamin A source — and for many reptile species, this works fine. Herbivorous and omnivorous reptiles convert beta-carotene to retinol efficiently.

Leopard geckos do not.

As obligate insectivores, leopard geckos have limited capacity to convert beta-carotene (a plant pigment) into retinol (the biologically active form of vitamin A). Research from the Association of Reptilian and Amphibian Veterinarians (ARAV) confirms that insectivorous reptiles require preformed retinol for adequate vitamin A status.

Why This Matters for Breeding

Vitamin A deficiency in breeding females manifests as:

• Reduced clutch viability (infertile or thin-shelled eggs)
• Stuck shed episodes increasing in frequency
• Eye swelling or discharge (squinting, closed eyes)
• Immune suppression — increased susceptibility to respiratory infections

For non-breeding geckos, mild vitamin A insufficiency may go unnoticed. For gravid females producing eggs every 2–4 weeks, the deficiency compounds rapidly.

Which Supplements Use Retinol?

• Retinol-based (recommended): Repashy Calcium Plus, Repashy SuperVite, Arcadia EarthPro-A
• Beta-carotene-based (less effective): Zoo Med Reptivite with D3, most generic multivitamins
• No vitamin A: Zoo Med Repti Calcium with D3, Arcadia EarthPro CalciumPro Mg (calcium-only products)

If your supplement uses beta-carotene, consider adding a retinol-based vitamin like Arcadia EarthPro-A once per week to ensure adequate vitamin A status during the breeding season.

D3 and Calcium: The Absorption Partnership

Calcium without D3 is wasted calcium. Vitamin D3 enables calcium absorption at the intestinal wall. Without it, dietary calcium passes through the body unused — regardless of how much you provide.

D3 Sources for Leopard Geckos

Most leopard gecko keepers do not provide UVB lighting (though the practice is becoming more common). Without UVB, the gecko cannot synthesize D3 from light exposure. Supplemental D3 in the diet becomes the sole source.

The D3 rule:

• No UVB → Must use calcium WITH D3 (supplement replaces natural synthesis)
• UVB lighting present → Use calcium WITHOUT D3 (UVB handles D3 production; supplemental D3 creates overdose risk)

D3 Toxicity: The Other Side

Excess D3 causes hypercalcemia — elevated blood calcium leading to soft tissue calcification, organ damage, and potentially death. D3 toxicity occurs from:

1. Stacking D3 sources — using calcium with D3 in a gecko that also has UVB lighting
2. Double-supplementing — using two products that both contain D3 at every feeding
3. Ad-libitum D3 access — placing D3-containing supplements in a free-choice dish

According to veterinary resources from the Merck Veterinary Manual, D3 toxicity in reptiles is well-documented and more common than most keepers realize. The solution is simple: use one D3 source, control the dose, and never combine UVB with supplemental D3.

MBD Prevention During Breeding: Why Gravid Females Are Highest-Risk

Metabolic bone disease (MBD) is the most common nutritional disorder in captive leopard geckos, and breeding females face the highest risk. Here is why:

The Calcium Drain of Egg Production

Each egg requires calcium carbonate for shell formation. A female leopard gecko producing 6–8 eggs per season (2–4 clutches of 2 eggs each) pulls calcium directly from her skeletal reserves when dietary calcium is insufficient.

The Ca:P (calcium to phosphorus) ratio in the diet must be at least 2:1 — meaning twice as much calcium as phosphorus. Most feeder insects are inverted at roughly 1:6 (crickets) or 1:3 (dubia roaches). Without calcium supplementation, every feeding actively depletes the gecko's calcium stores.

Prevention Checklist for Breeding Females

• Calcium dust on every insect feeding (no alternating)
• Free-choice plain calcium dish available 24/7
• D3 supplementation if no UVB lighting
• Preformed retinol vitamin A source (not beta-carotene)
• Pre-breeding weight check — do not breed underweight females
• Post-clutch recovery period of 2–3 weeks minimum

For more on recognizing early symptoms of nutritional disorders, see our reptile illness signs guide. For habitat setup that supports proper calcium metabolism (including heat for digestion), see our leopard gecko heating guide.

Supplement Stacking: What Goes with What

The biggest supplementation mistake breeders make is stacking — using multiple products with overlapping nutrients. Here are the safe combinations:

Option A: One-Jar Protocol (Simplest)

• Repashy Calcium Plus at every feeding
• Plain calcium dish (no D3) in enclosure 24/7
• No other supplements needed

Option B: Two-Product Protocol (Most Common)

• Zoo Med Repti Calcium with D3 at every feeding
• Repashy SuperVite 1–2 times per week (replaces one calcium dusting)
• Plain calcium dish (no D3) in enclosure 24/7

Option C: Modular Protocol (Most Precise)

• Arcadia EarthPro CalciumPro Mg at every feeding
• Arcadia EarthPro-A once per week
• Arcadia Revitalise D3 once per week (on a different day than EarthPro-A)
• Plain calcium dish (no D3) in enclosure 24/7

Warning: Never combine two D3-containing supplements at the same feeding. Never combine two vitamin-A-containing supplements at the same feeding. The body cannot excrete excess fat-soluble vitamins — they accumulate and cause toxicity.

Folate and Breeding

Folate (folic acid) deficiency has been linked to developmental defects in reptile embryos, similar to the well-documented role of folic acid in mammalian neural tube development. Gut-loaded feeder insects are the primary dietary source of folate for leopard geckos. Ensure your feeder insects are gut-loaded with dark leafy greens (collard greens, dandelion greens, mustard greens) for 24–48 hours before feeding to maximize folate transfer.

Both Repashy Calcium Plus and Repashy SuperVite contain folic acid in their formulas. If using a basic calcium-only product, gut-loading becomes the primary folate source.

Buying Guide: How to Choose the Right Supplement

Decision Framework

How many breeding geckos do you manage?

• 1–3 geckos → Option A (Repashy Calcium Plus): simplest, lowest risk of error
• 4–10 geckos → Option B (Zoo Med Repti Calcium with D3 + Repashy SuperVite): good balance of cost and coverage
• 10+ geckos → Option A or C: large-scale breeders either maximize simplicity (Option A) or maximize precision (Option C with the Arcadia system)

What is your UVB situation?

• No UVB → use calcium WITH D3 (Zoo Med, Repashy Calcium Plus, Zoo Med Reptivite)
• UVB present → use calcium WITHOUT D3 (Arcadia CalciumPro Mg, Repashy SuperCal NoD) + separate D3 only if vet recommends

Budget priority?

• Lowest cost: Zoo Med Repti Calcium with D3 ($5–$8) + Zoo Med Reptivite with D3 ($6–$10) = under $18 total
• Best value all-in-one: Repashy Calcium Plus ($8–$15) — one jar replaces two products
• Premium precision: Arcadia modular system ($30–$45 for the full set)

What to Avoid

• Supplements with only beta-carotene as vitamin A — insufficient for insectivorous geckos
• Calcium powders with phosphorus — defeats the purpose of correcting Ca:P ratio
• Human vitamin supplements — concentrations are calibrated for 150-pound mammals, not 60-gram geckos
• Expired supplements — D3 and vitamin A degrade over time. Check expiration dates and replace every 6–12 months

For a complete diet overview including feeder insect selection and gut-loading, see our leopard gecko diet guide.