Can Crested Geckos Eat Mealworms? Safety, Prep & Frequency
Safe — OccasionallyFeeding frequency: monthly
Crested geckos can eat mealworms as an infrequent treat, but their high fat content and heavily phosphorus-skewed mineral ratio (roughly 1:7 Ca:P) make them a poor dietary staple. Limit to small juveniles-safe sizes, gut-load beforehand, and dust with calcium to partially offset the imbalance.
How to Prepare
- Size-match the mealworm to the gecko: the insect's body should be no wider than the space between the gecko's eyes to reduce impaction risk from the chitinous exoskeleton.
- Gut-load 24–48 hours before feeding: house mealworms on a mix of oats, carrot, and dark leafy greens to increase their nutritional value before the gecko consumes them.
- Dust immediately before offering: coat lightly with a calcium-with-D3 powder to partially compensate for the innately poor 1:7 calcium-to-phosphorus ratio.
- Offer via feeding tongs or a shallow dish—never loose in substrate—to prevent the gecko from accidentally ingesting loose bedding while hunting.
- Remove uneaten mealworms within 30 minutes; live mealworms can bite a resting gecko and cause stress or minor injury.
Warnings
- High fat content (≈13% dry weight) can contribute to obesity and hepatic lipidosis if fed more than once or twice per month.
- The hard chitin exoskeleton is difficult to digest; hatchlings and geckos under 10 g should avoid mealworms entirely due to impaction risk.
- Mealworms alone cannot replace a complete crested-gecko diet (CGD) or Pangea-style meal-replacement powder; they lack the micronutrient profile crested geckos require.
- Never feed 'superworms' (Zophobas morio) as a mealworm substitute—they are significantly larger, higher in fat, and contain more chitin.
- Frozen-then-thawed mealworms lose moisture and some heat-labile nutrients; fresh, live, properly gut-loaded specimens are strongly preferred.
Nutrition Facts
| Calcium:Phosphorus ratio | ~1:7 (poor) |
| Crude fat (dry weight) | ~13% |
| Crude protein (dry weight) | ~20% |
| Moisture | ~62% |
| Chitin (indigestible fiber) | high — exoskeleton concern |
FAQ
- How often can I feed my crested gecko mealworms?
- Once or twice per month at most. Because mealworms are high in fat and carry a calcium-to-phosphorus ratio of roughly 1:7, frequent feeding disrupts mineral balance and risks weight gain. Think of them as a motivational treat rather than a nutritional cornerstone.
- Are mealworms dangerous for baby crested geckos?
- Yes, for hatchlings and juveniles under 10 g, mealworms pose a genuine impaction hazard. The chitinous exoskeleton resists digestion and can compact in a small gecko's gut. Wait until the gecko reliably exceeds 15–20 g before offering even small mealworms, and always size-match carefully.
- Is it better to use waxworms or mealworms as treats?
- Neither should be a staple, but mealworms are marginally preferable to waxworms for frequency because waxworms are even higher in fat (≈22% dry weight) and are considered more addictive to reptiles. Both should be limited to monthly or less.
- Do I need to dust mealworms with calcium before feeding?
- Yes, always. Mealworms' naturally poor Ca:P ratio means plain, undusted insects actively compete with calcium absorption. Lightly coat them in a calcium-with-D3 supplement powder immediately before feeding—not hours ahead, as moisture dissolves the coating.
- Can crested geckos eat dried mealworms from a pet store?
- Dried mealworms are not recommended. The dehydration process reduces moisture content and makes the exoskeleton proportionally harder and more compaction-prone. Dried insects also cannot be gut-loaded, eliminating the main nutritional upgrade strategy. Stick to live, gut-loaded specimens.
More Crested Geckos Foods
- Can crested geckos eat grapes?
- Can crested geckos eat strawberries?
- Can crested geckos eat blueberries?
- Can crested geckos eat apples?