What is usually contained inside soft gelatin capsules?

Soft gelatin capsules are primarily designed to contain liquids. This characteristic allows them to effectively deliver a variety of liquid formulations, which can include oils, solutions, or suspensions. The gelatin shell of the capsule is flexible and can easily accommodate these liquid contents, making the formulation stable and protecting the ingredients from environmental factors such as moisture and light.

The design of soft gelatin capsules also facilitates the absorption of the liquid contents when consumed, as the gelatin dissolves quickly in the gastrointestinal tract. This means that medications or supplements contained within soft gelatin capsules may have faster bioavailability compared to solid dosage forms.

The other options, while they describe forms of substances that can be used in pharmaceuticals, do not accurately represent the typical contents of soft gelatin capsules. For instance, solids and powders are usually found in hard capsules or tablet forms, and gases are generally not utilized in this particular dosage form due to issues with sealing and stability.