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Why Is Gelatin Used in Enteric-Coated Capsules?

Jul. 27, 2023

Gelatin is a common ingredient used in the production of enteric-coated capsules for pharmaceutical and dietary supplement formulations. Enteric-coated capsules are designed to resist the acidic environment of the stomach and dissolve in the alkaline environment of the small intestine. This unique property allows the contents of the capsules to be released at the desired location in the gastrointestinal tract, offering various benefits for certain medications and supplements. Let's explore why gelatin is used in enteric-coated capsules and the advantages it provides:


1. Protection of Sensitive Ingredients:

Certain active ingredients, such as enzymes, probiotics, and acid-sensitive drugs, may be damaged or degraded by the acidic environment of the stomach. By using enteric-coated capsules, which contain gelatin, the contents are protected from stomach acid until they reach the more neutral and alkaline environment of the small intestine. This ensures the stability and efficacy of the ingredients until they can be absorbed and utilized by the body.


2. Delayed Release of Medications:

Enteric-coated capsules are designed to delay the release of their contents, allowing for a more controlled and sustained release of medications or nutrients. Gelatin, as a component of the enteric coating, plays a crucial role in this delayed-release mechanism. It allows the capsule to pass through the stomach intact without dissolving, and only once it reaches the small intestine, where the pH is higher, does the gelatin coating dissolve and release the contents.


3. Reduced Gastric Irritation:

Some medications and supplements may cause gastric irritation or discomfort when they come into direct contact with the stomach lining. By using enteric-coated capsules with gelatin, the ingredients bypass the stomach, reducing the potential for irritation and ensuring a more comfortable experience for the patient or consumer.


4. Odor and Taste Masking:

Gelatin can also help mask the taste and odor of certain medications or supplements that may have unpleasant characteristics. The enteric coating with gelatin ensures that the contents are only released in the small intestine, where taste receptors are less sensitive, preventing the patient from experiencing any unwanted taste or smell during ingestion.


Enteric-Coated Empty Gelatin Capsules

5. Improved Bioavailability:

In some cases, certain medications or nutrients may have better bioavailability (the proportion of the active ingredient that enters the bloodstream and produces a therapeutic effect) when they are absorbed in the small intestine rather than the stomach. Enteric-coated capsules with gelatin can enhance the bioavailability of these compounds by ensuring their release in the optimal absorption site.


6. Protection Against Enzymatic Degradation:

Some enzymes, peptides, and proteins can be vulnerable to enzymatic degradation in the stomach's acidic environment. The use of gelatin-based enteric coatings provides a protective barrier against enzymatic action, preserving the integrity and activity of these sensitive compounds until they reach the small intestine.


7. Targeted Drug Delivery:

In certain cases, enteric-coated gelatin capsules can be utilized for targeted drug delivery. By using gelatin as part of the enteric coating, drugs can be delivered to specific regions of the gastrointestinal tract, where they are needed most for therapeutic effect. This targeted delivery can reduce side effects and optimize drug performance.


8. Compatibility with Active Ingredients:

Gelatin is a biocompatible and biodegradable material that is well-tolerated by the body. It is compatible with a wide range of active pharmaceutical ingredients (APIs) and supplement ingredients, making it a suitable choice for enteric-coated capsules.


9. Cost-Effectiveness and Availability:

Gelatin is readily available, cost-effective, and has a long history of safe use in pharmaceutical and dietary supplement applications. These factors contribute to its widespread adoption as a key component of enteric-coated capsules.


It's important to note that while gelatin is commonly used in enteric-coated capsules, some vegetarian alternatives are also available. Enteric coatings made from vegetarian sources, such as hydroxypropyl methylcellulose (HPMC), offer a suitable option for individuals with dietary restrictions or ethical preferences.



Gelatin is used in enteric-coated capsules primarily to protect sensitive ingredients from stomach acid, delay the release of medications, reduce gastric irritation, mask taste and odor, and improve bioavailability. Its biocompatibility, versatility, and cost-effectiveness make it a popular choice for pharmaceutical and dietary supplement formulations. By utilizing gelatin as part of the enteric coating, manufacturers can ensure the effective and targeted delivery of medications and nutrients, enhancing patient compliance and therapeutic outcomes. As consumer preferences continue to evolve, the availability of vegetarian alternatives to gelatin-based enteric coatings offers additional options for those with specific dietary considerations.

If you want to know more information about enteric-coated gelatin capsules, please contact us. We will provide professional answers.

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