If you own a reptile that eats live insects – like a bearded dragon, leopard gecko, chameleon or skink – then you’ve probably heard of the term “gut loading”. But what does it actually mean and why is it so important?

Simply put, gut loading is an easy way to boost the nutritious value of the insects your reptile eats. Despite these benefits, this critical aspect of reptile nutrition is often overlooked by beginners and even some experienced keepers.

We want to help change that.

In this guide, we’ll break down everything you need to know about gut loading insects: what it is, why it matters and how to do it right. Once you see how easy it is to level up your reptile’s diet, you’ll wish you had started gut loading sooner!

Gut loading is the process of feeding your live feeder insects (like crickets, dubia roaches, mealworms etc.) a highly nutritious diet for 24 to 48 hours before you feed them to your reptile. The goal is to “load” the gut of the insect with vitamins, minerals and essential nutrients, which are then passed on to your reptile when the insect is eaten.

Many feeder insects – especially crickets and mealworms – are naturally low in calcium and unbalanced in phosphorus, which can lead to nutritional deficiencies in reptiles.

Even if you dust insects with supplements, a malnourished insect is still empty calories and is not a healthy long term diet for reptiles.

Almost all common feeder insects benefit from gut loading.

The healthiest options for gut loading insects is plant based matter, grains, fresh vegetables and a little fruit. To maximize the creepy crawlies nutrition and provide your reptile with much needed micronutrients, here’s what you should be feeding:

There are also plenty of pre-formulated gut loading diets on the market that promise to offer a convenient and consistent option for busy keepers. While these can be useful, it’s important to remember that most commercial diets are processed which often means they’re less nutritious than fresh real foods.

Like all living creatures, feeder insects need proper hydration to stay alive and healthy. Happy hydrated insects, in turn, help keep your reptile hydrated by passing that moisture along to them when eaten.

Hydration Tips:

• Use slices of fruit or vegetables like cucumber or squash
• Avoid open water dishes (feeder insects can drown easily)
• Mist greens lightly before offering them

Although gut loading insects isn’t very labor intensive, in order to be successful some planning is still required. Not only is what you feed important, the timing of when you feed matters as well.

Feeder insects typically reach peak nutrient density 12 to 48 hours after feeding begins. You’ll want to keep track of when you feed and which insects you fed so that you’ll have enough nutritious boosted bugs ready for when you need them.

General Rule:

• Start gut loading insects 24 to 48 hours before feeding them to your reptile
• Don’t offer your reptile any bugs that haven’t eaten in over 48 hours – at that point they have lost most of their gut content and are not nutritionally boosted anymore

Whether you’re running a large facility or keeping reptiles as a hobbyist, gut loading stations can take many forms. No matter your setup, you don’t need anything elaborate to be successful – just a small separate container or a designated section within your insect colony will do.

What You Need:

• Small plastic tub or critter keeper
• Ventilation (screen lid or mesh holes)
• Paper towel or egg carton for climbing
• Food tray (plastic lid or shallow dish)
• Moisture source (misted greens, vegetable or fruit)

Just because a food is considered “healthy” doesn’t mean that it’s suitable for all species. Some items can be harmful to both feeder insects and reptiles.

The calcium-to-phosphorus ratio in your gut load matters. Aim for a 2:1 Ca:P ratio in what you feed your insects.

For example:

• Dandelion greens: Excellent (high calcium)
• Spinach: Avoid or use sparingly (binds calcium due to oxalates)
• Kale: Okay in moderation (some oxalates)

Gut loading isn’t just an extra step – it’s a nutritional cornerstone for any insectivorous reptile. With proper gut loading, you’re ensuring that your reptiles don’t receive empty calories and instead they get all of the vitamins, minerals, and hydration they need to thrive, stay healthy and active.

Remember, a well fed bug makes a well fed beardie (or gecko, or chameleon)!