How are softgel capsules manufactured?
Softgel capsules are manufactured using a rotary die encapsulation process that simultaneously forms a gelatin-based shell, fills it with a liquid or semi-solid formulation, and seals it into a single capsule. The process enables precise dosing, product stability, and efficient delivery of oils, nutrients, pharmaceuticals, and other active ingredients.
Answer
Softgel capsule manufacturing is a specialized encapsulation process used to produce hermetically sealed dosage forms containing liquid, suspension, or semi-solid formulations. Commonly used in the pharmaceutical, nutraceutical, and healthcare industries, softgels consist of an outer gelatin or plant-based shell surrounding a precisely measured fill material.
The manufacturing process begins with preparation of the shell mass and fill formulation. Gelatin, plasticizers, purified water, colorants, and other approved excipients are blended to create the capsule shell material, while active pharmaceutical ingredients (APIs), vitamins, minerals, botanical extracts, or oils are formulated separately. During rotary die encapsulation, two continuous ribbons of shell material are formed and brought together while the fill material is injected between them. The capsules are simultaneously shaped, filled, and sealed in a single operation.
Following encapsulation, softgels undergo drying, inspection, sorting, polishing, and packaging. Quality assurance (QA) and quality control (QC) activities evaluate capsule integrity, fill weight uniformity, dissolution performance, microbial quality, and stability. Advanced manufacturing facilities also implement in-process controls and automated inspection systems to maintain batch consistency.
In regulated environments, softgel manufacturing is performed under Good Manufacturing Practice (GMP) requirements and may be subject to oversight by agencies such as the FDA and EMA. Pharmaceutical companies, nutraceutical brands, and Contract Development and Manufacturing Organizations (CDMOs) use validated processes, documentation systems, and supply chain controls to ensure product quality, regulatory compliance, and commercial scalability.
