A hard gelatin capsule is a type of capsule used in the pharmaceutical industry to contain medicines, supplements, or other types of powdered or granulated substances. These capsules are made of two cylindrical sections that fit together, with one end slightly larger than the other. The larger end is typically filled with the medication or supplement, while the smaller end serves as a seal.

Hard gelatin capsules are made from gelatin, a protein derived from animal collagen. The gelatin is processed to form a solid shell that is resistant to heat and moisture. The capsules are easy to swallow and dissolve quickly in the stomach, allowing for the rapid release of the medication or supplement.

The benefits of using hard gelatin capsules include:

1. Protection: The capsules protect the medication from degradation due to exposure to moisture or air, ensuring that the medication remains effective.
2. Convenience: Capsules are easy to swallow and do not require the use of water, making them more convenient for patients.
3. Flexibility: Capsules can be filled with various types of medication, supplements, or other substances, allowing for greater flexibility in the formulation of products.
4. Customization: Capsules can be manufactured in various sizes and colors, allowing for branding and differentiation of products.

In summary, hard gelatin capsules are a widely used type of capsule in the pharmaceutical industry due to their convenience, protection, and versatility in the formulation of products.