Capsule Manufacturers in the UK
3 capsule manufacturers in the United Kingdom have a facility certified to NSF/ANSI 455-2 (GMP for dietary supplements) with capsules in its certified scope. Data checked against NSF’s public listing on October 5, 2026.
These supplement capsule manufacturers have a certified facility whose NSF/ANSI 455 scope lists capsules. Capsules are the most common format for new supplement brands because many formulas can be encapsulated without reformulation.
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All 3 manufacturers
Order: featured, founding members, listings with a website, then A–Z.
- NSF/ANSI 455-2checked Oct 5, 2026
- NSF/ANSI 455-2checked Oct 5, 2026
- NSF/ANSI 455-2checked Oct 5, 2026
Compare capsule manufacturers at a glance in the United Kingdom
- Of the 3 capsule manufacturers in the United Kingdom, the most common other dosage forms in certified scope are powders (3), tablets (3) and liquids (1).
- 2 of the 3 capsule manufacturers in the United Kingdom list a company website.
| Manufacturer | Location | Dosage forms in certified scope | Certification | Last checked |
|---|---|---|---|---|
| iiaa Ltd. | — | Capsules, Powders, Softgels, Tablets | NSF/ANSI 455-2 | |
| Supplement Factory Limited | — | Capsules, Powders, Tablets | NSF/ANSI 455-2 | |
| Cultech Ltd. | — | Capsules, Liquids, Oils, Powders, Tablets | NSF/ANSI 455-2 |
Questions buyers ask
What should I ask a capsule manufacturer?
Ask which shell types and capsule sizes they run, whether your formula fits your target serving, and whether they bottle in-house. Shell options can include gelatin, HPMC (vegetarian), enteric or delayed-release; check how many capsules your serving needs, and whether they label as well as bottle. Ask about MOQ and lead time per SKU; both vary by manufacturer.
What does NSF/ANSI 455-2 certification mean?
NSF/ANSI 455-2 is a good manufacturing practice (GMP) audit standard for dietary supplements. It is built around the US FDA’s dietary supplement GMP rule (21 CFR Part 111) and adds retailer-driven requirements, so facilities are audited against one harmonised checklist. Certification applies to a specific facility and is listed publicly by the certifier.
What should I ask for in a quote request?
Ask for minimum order quantity, lead times, formulation options, testing and certificates of analysis, in writing. In detail: ask about minimum order quantity (MOQ) per SKU, lead time for a first run and for reorders, whether they offer stock formulas or custom formulation, who sources raw materials, what testing they run (identity, potency, microbiological, heavy metals) and whether you receive a certificate of analysis (COA) per batch, and whether they support the label claims you plan to make. Terms vary widely by manufacturer, so compare written answers rather than assumptions.
How do I verify a manufacturer’s GMP certification myself?
Ask the manufacturer for their current certificate and the exact facility address it covers, then look that facility up on the certifier’s public listing (for NSF/ANSI 455, NSF’s online listings). Certificates apply to specific sites, so make sure the facility that will make your product is the one listed. Each profile here links to the public listing we checked and the date we checked it.