What are capsules filled with?

Capsules are designed to hold medication in a specific format, typically using a gelatin shell that encases the active ingredients. The shell can either be hard or soft, depending on the type of capsule. Inside these gelatin containers, you will often find powders—usually in a finely milled form that allows for easy absorption once ingested. This form is particularly beneficial because it allows for controlled dosing and can mask the taste of the medication, making it easier to swallow. While some capsules may contain liquid formulations, the most common contents are indeed powders, which explains why the filling of capsules is generally understood to be a gel encapsulated within a powder format.