Walk through any pharmacy or online supplement store and you will find hard gelatin capsules everywhere: multivitamins, minerals, herbal extracts, protein blends and more. For nutraceutical brands, the hard gelatin capsule is often the fastest, most flexible and most consumer-friendly way to bring a product to market.
The short answer
Hard gelatin capsules suit supplements because they need no binders or compression, mask taste and smell, are easy to swallow, and can be filled in small or large batches. Most brands use size 0 or 00, with colours or printing to stand out.
Why supplement brands choose hard gelatin capsules
- Simple formulation: powders and granules can be filled with few or no excipients, unlike tablets that need binders and compression.
- Taste and smell masking: ideal for bitter herbs, fish-derived powders and minerals.
- Easy to swallow: smooth, glossy shells are preferred by many consumers. See capsules vs tablets.
- Fast release: gelatin dissolves quickly in the stomach. See dissolution and drug release.
- Flexible batch sizes: fill on manual machines for small runs or automatic machines for scale.
- Branding: colours, two-tone shades, pearl or metallic finishes and printing.
Common supplement categories and capsule choices
| Supplement type | Common sizes | Shell choice |
|---|---|---|
| Multivitamins and minerals | 0, 00 | Opaque or two-tone to protect light-sensitive vitamins |
| Herbal and Ayurvedic powders | 0, 00 | Transparent or green/brown shades |
| Probiotics | 0, 1 | Opaque shells; low-moisture storage is important |
| Sports and protein blends | 00, 000 | Bold colours or printed for branding |
| Children's and low-dose products | 3, 4 | Smaller, bright shades. See paediatric formulations |
Use our size chart to match the size to your fill weight and powder density.
Steps to launch a capsule supplement
- Finalise the formula and dose per capsule.
- Measure powder density and choose the capsule size.
- Choose colour, finish and printing for your brand.
- Get samples and run a filling trial. See how to fill empty capsules.
- Check labelling and regulatory requirements for your market.
- Place the bulk order and plan storage.
Quality and certification
Supplement buyers and retailers increasingly ask for documentation. Choose capsules made from pharmaceutical-grade, TSE/BSE-free gelatin with Halal and Kosher certification, supplied with a certificate of analysis for every batch. Read about Halal certification and quality control.
Universe Capsules, Indore, supplies hard gelatin capsules to nutraceutical and pharmaceutical companies in sizes 000 to 5, in plain, coloured, pearl, metallic and printed options, made under WHO-GMP norms.
Frequently asked questions
Are hard gelatin capsules good for supplements?
Yes. They are one of the most popular formats for vitamins, minerals and herbal products because they are simple to fill and easy to swallow.
Which capsule size is best for supplements?
Size 0 and 00 are the most common, but the right size depends on your dose and powder density.
Can I put my brand on the capsule?
Yes. Capsules can be printed with your brand name or logo, and colours can be matched to your packaging.
