Supplement dusting is the practice of coating livefood in a fine powder, usually a calcium or multivitamin product, immediately before it's offered. It's one of the most commonly used feeding practices in reptile keeping, and it's typically talked about alongside gut-loading, because the two work together rather than as alternatives.
Most keepers feeding insectivorous or carnivorous reptiles will, at some point, weigh up live food against frozen food. The two are not simply different products, they are different systems with different storage, handling and preparation needs, and understanding those differences matters more than any argument about which is better.
The handling routines differ too. Live food needs regular checking, feeding, and sometimes gut-loading before it's offered. Frozen food needs strict hygiene: separate equipment, thorough handwashing, and a clear system so nothing sits out longer than it should.
The safest general approach is to thaw slowly rather than quickly. Moving frozen food from the freezer to a fridge the night before it's needed gives it time to thaw evenly without sitting at room temperature for hours, which is where bacterial growth becomes more of a concern. Where a fridge isn't practical, a sealed bag placed in room-temperature water, changed periodically as it cools, is a commonly used alternative that still avoids the extremes of very hot water or direct heat sources, both of which can affect the food unevenly and pose a burn risk if used carelessly.
Checking the tub regularly is the habit that ties all of this reptile supplies retailer together. A quick look every day or two lets you spot and remove any insects that have died, top up food and water sources, and catch problems like condensation or mould before they spread through the whole container.
Live food covers insects and other invertebrates delivered and kept alive until they're offered: crickets, locusts, mealworms, and similar. Because the animal is alive, storage means providing enough ventilation, an appropriate temperature range, and often a food source of its own so it stays in good condition until feeding day. It also means checking on it between deliveries rather than leaving a tub untouched in a cupboard.