Supplement Contract Manufacturers in the UK

Start with the USA list, check the exact facility and its certificate scope, and confirm supplement contract manufacturing. Ask for the minimum order, first-run and reorder lead times, testing plan and an itemized quote. Website capabilities are company claims unless a separate registry basis is shown; confirm the proposed work directly.

A contract manufacturer produces supplements that another company sells under its own brand. Some offer custom formulation and development; others mainly run your formula or offer stock (private label) formulas you can put your label on. Many also handle packaging, labelling and testing.

No. A company is listed here when one of its facilities is on a public registry we check and its own website says it offers contract manufacturing. We keep the quote, the page and the date we checked, and show them on the company’s profile. The registry certification is checked by us; the claim is the company’s own, so confirm it with the manufacturer before you rely on it.

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.

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.

A supplier may sell an ingredient or finished product without operating the facility that makes it. Ask for the actual manufacturing and packaging sites and put each party’s responsibilities in writing. FDA’s CGMP guidance addresses operations such as manufacturing, packaging, labeling and holding. Match the facility record to the work your order needs, rather than relying on a sales office address.

There is no single shelf life for every supplement. FDA’s dietary supplement CGMP guidance says an expiration date is not required by that rule, but a date used on a label should have supporting data. Ask for stability evidence for your formula in the proposed packaging and storage conditions; a manufacturing date alone does not tell you how long the product will meet its specifications.