Hard Capsules - Contract Manufacturing

Welcome to the most comprehensive source of information about hard capsules!

We specialize in contract manufacturing of hard capsules , tailoring the process to our clients' individual needs. Our experience and advanced production technologies allow us to produce products that meet the highest quality standards, making us a reliable partner in the industry.

With the following compendium of knowledge, you'll discover why hard capsules are so popular in the dietary supplement industry. You'll learn about their benefits, the production process , and the best practices we use to ensure your products are always of the highest quality.

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    Production of dietary supplements in an ISO-certified company.

    Hard capsule

    A hard capsule is a solid oral form consisting of two snap-fit ​​parts: a cap and a body. It is used to administer precisely measured doses of various substances – not only medicinal substances but also vitamins, minerals, herbal extracts, and other dietary supplement ingredients , most often in powder or granular form. Unlike a soft capsule , its shell does not contain plasticizers.

    Why hard capsules in dietary supplements?

    Hard capsules are among the most popular forms of dietary supplements—and for good reason. Thanks to their two-part design and stable materials (such as gelatin or HPMC), they are not only convenient to take but also effectively protect the active ingredients.

    This form is ideal for vitamin, mineral and herbal preparations, ensuring precise dosing and rapid dissolution in the stomach, which affects the effectiveness of supplementation.

    • Effective protection of ingredients against oxidation and moisture
    • Possibility of combining several substances in one capsule
    • Easy to swallow and comfortable to use

    Thanks to a precise manufacturing process, hard capsules ensure optimal protection of ingredients, which translates into improved bioavailability and effectiveness of dietary supplements. By choosing this form, manufacturers gain guaranteed quality and flexibility in selecting sizes and materials.

    Hard Capsule Manufacturer (B2B)

    As an experienced contract manufacturer of hard capsules , we support companies in the dietary supplement and pharmaceutical sectors in bringing their ideas to life. Our team of specialists provides comprehensive production support : from initial concept and formulation development to final packaging of the finished hard capsules . This allows you to focus on building your brand and sales, while we handle the technological and regulatory issues.

    Whether you want to introduce a new dietary supplement to the market or expand your portfolio with another product line, we offer:

    • Professional R&D laboratory for formula design
    • Modern machinery with the possibility of filling various forms (powders, granulates, liquids)
    • Personalization options: capsule sizes, colors, prints
    • Raw materials for the production of dietary supplements: gelatin, HPMC, acid-resistant capsules and others
    • Flexible production capacities: both small and large batches

    All processes are conducted in compliance with stringent GMP and ISO standards . Advanced quality control procedures ensure that each batch of capsules meets the requirements of both the pharmaceutical and supplementation industries.

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    Production of hard capsules in a modern technological line.

    Hard Capsule Production

    Hard capsules are manufactured by forming two cylindrical parts, which are then joined together after being filled with the active ingredient. This process typically involves dipping the molds in a solution of gelatin or another suitable material, drying, removing, and joining the finished capsule parts.

    Hard capsule production process:

    1. Preparation of shells:
      • Capsule-shaped molds are immersed in a solution of gelatin or other material (e.g. cellulose).
      • After removal from the solution, the molds are dried to obtain the appropriate shell hardness.
      • The finished, dried shells are removed from the molds.
    2. Filling:
      • The capsules are filled with an appropriate mixture of active and auxiliary ingredients.
      • The filling process can be done manually or automatically, depending on the scale of production.
    3. Connecting and closing:
      • The two parts of the capsule (body and lid) are joined together to form a closed whole.
      • This process can be automated to ensure precise and rapid closure of capsules.
    4. Quality control:
      • Finished capsules undergo quality control to ensure compliance with required standards.
      • The inspection may include checking weight, tightness, appearance and other parameters.
    5. Packing and packaging of dietary supplements:
      • The capsules are packed in appropriate packaging (e.g. blisters, bottles, sachets).
      • The ready-made packages are labeled supplements and prepared for shipment.

    Types of hard capsules:

    Hard capsules can be made from a variety of materials, allowing you to tailor them to your preferences and product specifics. Whether you prefer traditional gelatin capsules, plant-based solutions (HPMC), or acid-resistant forms, it's always worth understanding the features and benefits of each type.

    • Hard gelatin capsules: The most popular type of capsule, made from animal-derived gelatin. It dissolves quickly in the stomach and is widely available on the market.
    • Hard vegetable capsules (HPMC): An animal-free alternative, ideal for vegans and vegetarians. HPMC capsules are neutral in taste and stable even at lower humidity levels.
    • Acid-resistant hard capsules: Thanks to a special protective layer, they dissolve only in the intestine, protecting the active ingredients from the effects of stomach acid. This is an excellent choice for probiotics and other sensitive formulas.

    Application of hard capsules:

    Hard capsules are commonly used in the production of dietary supplements and medications. They provide precise dosing, are easy to swallow, and have a neutral taste and smell, making them a popular choice among patients and consumers.

    Examples of uses for hard capsules :

    • Multivitamin and mineral
      The combination of vitamins and minerals in one hard capsule enables convenient supplementation, saving space in the medicine cabinet and facilitating regular use by the consumer.

    • Herbal preparations
      Plant extracts with intense flavors or aromas are encapsulated, minimizing discomfort during ingestion. Hard capsules help protect the herbs from moisture and UV rays.

    • Probiotics and prebiotics
      Thanks to acid-resistant technology, sensitive probiotic bacteria can pass through the stomach and reach the intestines, which increases the product's effectiveness.

    Hard capsules are also suitable for many other categories of dietary supplements and pharmaceutical products, from sports and vitamin products to specialized preparations tailored to the needs of specific customer groups.

    Dietary supplements in capsules against the background of a modern laboratory.
    Dietary supplements in capsules and powder on contract manufacturing.
    Hard capsules in the production of dietary supplements, high quality and safety.
    Dietary supplement in capsules against the background of a production laboratory.

    Production of hard gelatin capsules

    Hard gelatin capsules are produced using the immersion method. This involves dipping special plungers into a gelatin solution, then drying, removing, and sealing the capsules. These capsules consist of two cylindrical parts: a base and a cap, which are typically made of gelatin or alternative plant materials such as HPMC.

    Hard gelatin capsule production process:

    1. Immersion: Metal pins of appropriate shape are immersed in a heated gelatin solution.
    2. Turning and drying: The pins are rotated to evenly distribute the gelatin and form the capsule walls. They are then dried under controlled conditions.
    3. Removal and trimming: After drying, the capsules are removed from the mandrels and cut to the appropriate length.
    4. Connecting and quality control: The capsule body and lid are assembled and the finished capsules are subjected to quality control.

    Advanced aspects and unique technologies used in hard capsules:

    • Band-sealing: To prevent tampering and improve stability, a gelatin or cellulose band can be applied to the joint between the two halves of the hard capsule. This is crucial for potent drugs and premium products.
    • Enteric-coated hard capsules: They are coated with a special polymer layer that is resistant to stomach acid. This allows the hard capsule to dissolve only in the small intestine, protecting the active ingredient (e.g., probiotics, enzymes) from destruction or stomach irritation.
    • Hygroscopicity problem: Both gelatin and HPMC (vegetable capsules) are sensitive to moisture. Hard gelatin capsules can become brittle at low humidity and sticky at high humidity. Material selection and production/storage conditions are critical for moisture-sensitive substances.
    • Electrostatic charges: Powders can generate electrostatic charges during automatic filling, making precise dosing difficult. Manufacturers use special lubricants (e.g. silicon dioxide) or ionizing systems to neutralize this effect.
    • Capsule-in-capsule technology: An advanced delivery system where a smaller, pre-filled hard capsule is placed inside a larger, outer capsule. This allows for the separation of incompatible ingredients or a two-phase release of the substance.

    Additional information about hard capsules:

    • Hard capsules can be filled with various substances, such as powders, granulates, liquids or pellets.
    • They are often used in the production of dietary supplements, but can also be used in the pharmaceutical industry.
    • Hard capsules They are easy to swallow and have a neutral taste, which is their advantage.
    • They can be colored and printed, making them easier to identify.
    • Hard Capsule Production can be implemented within the framework of contract production of dietary supplements, where an external company manufactures the capsules on request.
    • It is worth adding that the production hard capsules requires appropriate equipment and adherence to hygiene rules to ensure high quality product and consumer safety.

    Fun fact: The history of using alternatives to gelatin

    The development of alternative materials to gelatin in hard capsules began in the 70s, but it was not until 1989 that HPMC capsules were introduced and gained popularity as a vegan-friendly option. Earlier attempts involved starch modifications, but these did not meet the required stability and quality standards for pharmaceutical applications.
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    Interesting fact: Capsules that protect the intestinal microbiota

    Some hard capsules are designed to open only in the small intestine, where they release substances that support the gut microbiota. They are specially coated with materials that are resistant to stomach acids, so the contents are protected until they reach the right place in the digestive tract.
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    Fun fact: Static effect in capsule production

    When producing capsules with dry powders, the problem is often the electrostatic charge of the ingredients, which can lead to them sticking to the production equipment. To prevent this, special antistatic substances are added to the powders, which minimize this effect, ensuring uniform filling of the capsules.
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    Materials Used in the Production of Hard Capsules

    Gelatine

    Traditionally, hard capsules are made from animal-derived gelatin, primarily obtained from the collagen in the skin and bones of cattle or pigs. Gelatin is a material:

    • Biodegradable and biocompatible: Well tolerated by the human body.
    • Flexible and durable: It allows for the formation of thin but durable capsule walls.
    • Soluble in gastric juice: It enables rapid release of the active substance after ingestion.

    Alternative Materials

    In response to the needs of people with dietary restrictions and religious requirements, capsules made from plant materials have been developed:

    • Hydroxypropylmethylcellulose (HPMC): A cellulose derivative, free from animal components, stable in various pH conditions.
    • Pullulan: A polysaccharide obtained from the fermentation of starch by fungi; characterized by high transparency and resistance to oxygen.
    • Modified starch: Used to produce slowly dissolving or delayed release capsules.

    Thanks to a variety of materials, hard capsules can be precisely tailored to consumer dietary requirements, the nature of active ingredients, and your brand's preferences. By choosing the right material, you gain control over release, aesthetics, and compliance with dietary standards.

    Comparison of Materials Used in the Production of Hard Capsules

    Material Origin Advantages Disadvantages Destiny
    Gelatine Animal (skin, bones) Biodegradable, biocompatible, soluble in gastric juice Sensitive to moisture, not suitable for vegans Traditional hard capsules
    Hydroxypropyl methylcellulose (HPMC) Vegetable Stable at various pH levels, free from animal ingredients Higher cost of production Capsules for vegans and vegetarians
    pullulan Starch fermentation High transparency, oxygen resistance High price Vegetable capsules
    Modified Starch Vegetable Slow dissolving, delayed release Limited stability in some conditions Delayed release formulations

    Contract manufacturing of hard capsules with IOC

    Key strengths hard capsules produced by IOC sp. z o. o. focus on their unmatched quality, precision of workmanship and efficiency in delivering active ingredients.

    International Organic Company (IOC) since 2009 specializes in production of hard capsules and more. As leader in the industry, we offer the highest quality products, confirmed by international standards ISO and GMP certificates. Our 15 years of experience on the global market guarantees reliability and innovation.

    Jako renowned manufacturer hard capsules, our company IOC operates in a modern production plant in Poland. We apply international GMP and ISO 22000 standards, thanks to which we deliver products of the highest quality and safety.

    Contract manufacturing of hard capsules is the process of producing capsules, a popular dosage form for medications and dietary supplements . The complete production process for a hard capsule supplement involves creating a hollow, two-part shell by immersing special molds in a solution, drying and trimming them, and then filling the shell, which involves opening, precisely dosing the substance, and finally sealing it tightly.

    Hard Capsule Production – Incooperation step by step

    Contract manufacturing of hard capsules offers a comprehensive, transparent process that allows for the efficient implementation of your dietary supplement project. From initial contact to final production and delivery, we provide full support at every stage.

    • Contact and needs analysis: We start with a consultation, during which we determine your requirements and expectations.
    • Recipe development: Our R&D laboratory prepares the prototype and adjusts the composition using the latest technologies.
    • Testing and Validation: The prototype is undergoing quality and stability testing to meet GMP and ISO standards.
    • Contract production: Once approved, we begin mass production, guaranteeing the uniformity and high quality of each batch.
    • Delivery and support: We ensure timely order fulfillment and full logistical support.

    Our approach ensures that every stage of cooperation is transparent and tailored to individual needs, allowing you to focus on developing your brand.


    The contract manufacturing process
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    I recommend the company with all my heart IOCWe are very pleased with our collaboration, excellent communication, support, and professional approach to dietary supplement production. Products created to order They meet our high expectations, and their quality is fully commensurate with the price. Working with the Sales and Project Manager and the company owner is a pure pleasure. I wish there were more such competent and committed women in the business world!
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    Highly recommended for collaboration with this company. We are working together on the production of certain dietary supplements, and every agreement has been honored! The team is exceptionally dedicated and professional in their work and in their commitment to meeting our needs as partners. Once again, a strong recommendation to start working with IOC.
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    We have been working together for several years. I can't imagine a better contractor.
    We have been working together for several years. I can't imagine a better contractor. 1. Always on-time deliveries, 2. Help with everything that is needed around the product from the legal requirements perspective. Thanks to that I can focus on selling products, 3. Really good prices for products I highly recommend!
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    Innovation, specially selected ingredients, creation of products on special request, price adequate to quality and fantastic communication
    Innovation, specially selected ingredients, creating products on special order, price adequate to quality and fantastic communication - this is how I would describe in the shortest way what the company is associated with. IOC. And a fantastic owner - I wish there were more women like her in business. I highly recommend her.
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    I give it a five! We are a distributor of cosmetics from the company IOC for a dozen or so years. Our large group of trusted Clients is the best recommendation, the products defend themselves. The cosmetics are innovative, they fully meet the expectations of even the most demanding ones. I recommend!
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    Opinions and implementations

    Our past accomplishments speak for themselves. Check out what our clients say and see examples of successful collaborations that confirm our expertise in supplement production.

    "Thanks to your cooperation, our supplement line has reached a new level of quality. Professional approach and full support at every stage of the project made us feel safe and appreciated."

    "Realizations at the highest level. Thanks to your modern solutions and experience, we have gained a partner we can rely on. We recommend you to anyone who values ​​quality and precision."

    "Realizations at the highest level. Thanks to your modern solutions and experience, we have gained a partner we can rely on. We recommend you to anyone who values ​​quality and precision."

    – Customer (data covered by NDA)
    IOC does not have any dietary supplements on the market under its own brand. All implementations belong to our clients based on NDA agreements.

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      Hard Capsule Sizes

      Hard capsules are available in various sizes, from 000 (the largest) to 5 (the smallest). The choice of size depends on the volume and density of the active ingredient and the intended dose.

      Capsule Size Capacity (ml) Application
      000 1.37 Large doses of medications and supplements, less frequently used due to difficulty swallowing.
      00 0.95 Most commonly used, suitable for high doses.
      0 0.68 Universal, used in dietary supplements and medicines.
      1 0.5 Smaller doses of the substance, suitable for children.
      2 0.37 For small doses of medications, easy to swallow.
      3 0.3 For minimal doses, easiest to swallow.
      4 0.2 Very small doses, specialized use.
      5 0.13 The smallest capsules available, used in pediatrics or for microdoses.

      Quality Standards Used in the Production of Hard Capsules

      The production of hard capsules must meet strict quality standards set by pharmacopoeias and regulatory authorities:

      • Mass Uniformity: Capsule weight variations must be within certain limits.
      • Solubility and Release: Capsules must meet requirements regarding disintegration time and release profile of the active substance.
      • Microbiological Purity: Materials used to manufacture capsules must be free from microbiological contamination.
      Norma Description
      Mass Uniformity Capsule weight variations must be within certain limits.
      Solubility and Release Capsules must meet requirements regarding disintegration time and release profile of the substance.
      Microbiological purity Materials used for production must be free from microbiological contamination.

      Hard capsules vs. tablets and soft capsules

      Comparison Hard capsules Tablets Soft gelatin capsules
      Composition Powder or granules, enclosed in a hard gelatin shell Compressed powder or granules Liquids or semi-solids in elastic gelatin
      Release Rapid release in the digestive system Slower release, solubility dependent Quick release, especially for liquids
      Advantages Easy to swallow, no distinct taste Possibility of dividing and precise dosing Perfect for liquid substances, gentle on the digestive tract
      Disadvantages You can't always figure them out; not suitable for vegans Unpleasant taste, slower absorption More expensive to produce, may be difficult to swallow for some

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      Personalization and Formulation Flexibility in IOC

      W International Organic Company (IOC) we know how important it is to fully customize hard capsules to meet your brand's expectations. We offer a flexible approach to formulation - you can choose active ingredients in powder or granulate form, adjust their concentrations and add unique ingredients that will distinguish your product. What's more, we personalize the appearance of capsules - from size, through color, to type of coating. With us, you can be sure that your product will be perfectly suited to the needs of the market and your vision.
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      Fun fact: The secret to wall thickness uniformity

      The wall thickness of hard capsules must be exceptionally uniform to ensure precise drug release and adequate mechanical strength. This is achieved by specific, repeatable rotation of the pins during immersion in gelatin, which allows for even distribution of the material. This uniformity is monitored by laser sensors, which ensures consistent quality of the final product.
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      Interesting fact: Hard capsules in inhalers

      Hard capsules are also used in some powder inhalers, such as the popular DPI (Dry Powder Inhalers). In this case, capsules filled with powder are pierced and the patient inhales the content. The capsule material must be very precisely selected to avoid fragmentation during piercing, which could enter the respiratory system.
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      Interesting fact: The impact of UV lighting on the durability of capsules

      The impact of ultraviolet light is a key factor in the durability of hard capsules. For example, some active ingredients can be degraded by UV light, which leads to a reduction in their effectiveness. Therefore, capsules with added dyes are used in the production and storage process, which block UV light, protecting the active ingredient.
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      Fun fact: The phenomenon of "encapsulation in a capsule"

      Some advanced formulations use the "capsule encapsulation" method, which involves placing a smaller capsule inside a larger one. This allows for the separation of ingredients that may be incompatible with each other, or for the introduction of additional release features, such as delivering one substance in the stomach and another in the intestine.
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      hard capsules in an elegant glass bottle from IOC

      Frequently asked questions (FAQ)

      Below, we've answered the most common questions about hard capsules . The content is also enriched with structured data ( FAQ schema ), which can help Google display these questions more easily in search results.

      1. Are hard capsules suitable for any type of supplement?

      In most cases, yes. Hard capsules are versatile and protect the active ingredients from moisture and light. If your formula requires additional protection from stomach acid, acid-resistant capsules are worth considering.

      2. What is the difference between gelatin capsules and vegetable capsules (HPMC)?

      Gelatin capsules are made from animal gelatin and dissolve quickly in the stomach. HPMC (plant-based) capsules, on the other hand, contain no animal ingredients, are suitable for vegans and vegetarians, and have a neutral taste.

      3. What is the minimum order quantity?

      It depends on the type of capsules and the composition of the supplement. We offer flexible starting batches (e.g. several thousand pieces), but we also carry out mass orders for larger brands.

      4. Is it possible to dye and print on capsules?

      Yes. You can customize the color of the capsules and make prints (e.g. logo, brand name) to distinguish your product from the competition.

      To learn more about supplement production and additional opportunities, we encourage you to review the materials below.

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