As a common form of packaging for medicines and health products, the chemical composition and characteristics of gelatin capsules are crucial to product quality and safety. Understanding the chemical composition of gelatin capsules will help exporters and international buyers better evaluate product standards.
The main component of gelatin capsules is gelatin, a natural high-molecular protein made by hydrolysis of animal collagen. Collagen is usually derived from the skin and bones of animals such as cattle and pigs, and gelatin is extracted after acid or alkali treatment. Gelatin itself is a mixture, mainly containing amino acids such as glycine, proline, and hydroxyproline, which give gelatin good film-forming properties, flexibility, and biocompatibility.
In addition to gelatin, capsules may also contain a small amount of excipients to improve their performance or adapt to specific needs. For example, glycerol or sorbitol are often used as plasticizers to increase the flexibility of capsules and prevent brittle cracking; titanium dioxide may be used as a sunscreen to produce opaque capsules; in addition, a small amount of preservatives or pigments may be added to meet the needs of different products. It is worth noting that the excipients of gelatin capsules must comply with international food safety standards to ensure their safety in medicines and health products.
In recent years, the demand for plant-based capsules has gradually increased, especially for markets targeting vegetarian consumers or religious dietary restrictions. Plant capsules usually use hydroxypropyl methylcellulose (HPMC) as the main ingredient, which has different chemical properties from gelatin but can also provide stable encapsulation performance. However, traditional gelatin capsules are still the mainstream choice in the market due to their mature process and wide application.
In international trade, the quality standards of gelatin capsules usually refer to the provisions of the Chinese Pharmacopoeia or international pharmacopoeias (such as USP, EP), and have strict requirements for indicators such as heavy metals and microbial limits. Exporting companies need to ensure that their products comply with the regulations of the target market, especially in regions such as the EU and the United States that have strict restrictions on excipients and contaminants.
The chemical composition of gelatin capsules directly affects their physical properties and applicability. Understanding these basics will help companies choose suitable products in the international market to meet diverse needs.
