How to Find a Supplement Manufacturer for Your Brand

Start with dosage forms. A contract manufacturer that runs capsule filling, tablet compression, and powder blending in-house can keep your unit cost lower and your timeline tighter. Ask for fill weight ranges: capsules from 300 mg to 1,000 mg, tablets from 500 mg to 1,500 mg, and powders from 100 g to 5,000 g. If your product needs a specific capsule size or a coated tablet, confirm the line supports it before requesting a quote.

Capacity matters when you scale. A plant that runs two shifts and outputs up to 2 million capsules per day can handle a 50,000-unit order without pushing your lead time past 35 working days. Ask how many bottling lines are dedicated to retail packaging and whether they handle induction sealing, child-resistant caps, and label application. These details decide whether your first production run ships on time or sits in a queue.

Your formula is the product. A manufacturer should tell you which ingredients are stock and which are custom. For stock ingredients, ask for a certificate of analysis (COA) and a specification sheet. For custom blends, confirm whether the plant can source the raw material, test it, and hold it under quarantine until release. Ingredient lead times vary: common vitamins and minerals arrive in 5–10 days, while botanical extracts or branded ingredients can take 15–30 days.

Check the allergen and diet profile. If you sell in the EU or UK, your label must declare allergens. If you target the Middle East, halal certification is often required. If you sell organic, the facility needs USDA organic or EU organic certification. A manufacturer that already holds these certifications avoids a second audit. Ask for the certificate numbers and expiration dates before you place a deposit.

Compliance is not a logo on a website. Ask for the facility’s GMP certificate, ISO 22000 certificate, and HACCP plan summary. If the plant is FDA-registered, that is a registration, not an approval. Confirm the registration number and the last inspection date. For EU customers, check whether the manufacturer follows EU GMP Annex 1 or equivalent. These documents protect your brand if a customs agent or retailer asks for proof.

Logistics decide your landed cost. Ask for the port of departure, typical freight terms, and whether the manufacturer handles export documentation. A plant in Guangdong can ship from Yantian or Shekou to Los Angeles in 14–18 days, or to Rotterdam in 22–28 days. Request a packing list and a commercial invoice template before production starts. A manufacturer that provides these upfront saves you weeks of back-and-forth with your freight forwarder.

A contract manufacturer's quality system should be verifiable before you place a purchase order. Ask for the testing scope on every batch: identity (FTIR or HPLC against a reference standard), potency (assay of the active marker), microbial limits (total aerobic count, yeast and mould, E. coli, Salmonella), heavy metals (lead, arsenic, cadmium, mercury by ICP-MS), and disintegration or dissolution where relevant. Confirm whether these are run in-house or at an external ISO 17025 laboratory, and request a sample certificate of analysis for a product similar to yours.

Timing matters as much as scope. Incoming raw materials should be quarantined and tested before release to production, with identity confirmed on receipt. Finished-product testing typically occurs after packaging, with results released before shipment. Batch records should link raw material lot numbers to the finished lot, record fill weights and machine settings, and carry operator and QA sign-offs. Ask how deviations and out-of-specification results are handled, and whether you will be notified before a batch ships.

A certificate of analysis for each batch should list the product name, lot number, manufacture and expiry dates, the tests performed, specification limits, results, and the method used. It should be signed and dated by a qualified person. Retention samples are normally kept for the shelf life plus 12 months, stored under label conditions. Stability protocols commonly run at 25°C/60% RH and 40°C/75% RH for accelerated data, with time points at 0, 3, 6, 12, 18 and 24 months depending on the claimed shelf life.

When comparing supplement manufacturers, request a redacted batch record and a recent COA rather than a generic brochure. Check that the COA lot number matches the batch record and that the expiry date is consistent with the stability data. If a manufacturer cannot produce these documents on request, treat that as a signal about documentation discipline, not as a paperwork delay.

Packaging format drives cost and MOQ as much as the formula. Common options are HDPE bottles with induction seals and child-resistant closures, blisters for unit-dose tablets and capsules, stick packs for powders, and sachets for single-serve mixes. Bottle sizes typically range from 60 to 300 cc, with fill counts from 30 to 180 capsules. Stick packs usually run 5 to 30 g, and sachets 2 to 10 g. Confirm whether the manufacturer supplies stock bottles or requires you to source custom tooling, and who owns that tooling.

For the US market, the dietary supplement label must carry a statement of identity, net quantity of contents, a Supplement Facts panel with serving size and percent daily value where established, an ingredient list using the names in the panel, and a domestic address or phone number for the responsible firm. Allergen declarations and warnings are required where applicable. Lot code and best-by date must be printed or embossed on the primary package and, for retail, on the carton. Ask how coding is applied and whether it is legible after shrink-wrap.

Carton and pallet specifications should be agreed in writing. A typical export carton holds 12 to 48 bottles, with dimensions and gross weight stated per SKU. Pallet configurations are usually 48 x 40 in or 1200 x 1000 mm, with stretch-wrap and edge boards. If you sell on Amazon, the manufacturer can apply FNSKU labels and poly-bag units to FBA requirements, but you remain responsible for the listing and compliance documents. Confirm whether the factory handles retail-specific labelling or only bulk cartons.

Retail readiness also means artwork control. Provide print-ready files with correct dielines, and ask for a pre-production proof before the run. Check that the Supplement Facts panel matches the formula actually produced, since a last-minute formula change can invalidate printed labels. Agree who bears the cost of label reprints caused by artwork errors, and build a label approval step into the production schedule so it does not compress the lead time.

The sample timeline usually runs 7 to 10 working days after formula and packaging are agreed, and it includes making a pilot batch, filling samples, and issuing a preliminary COA. Courier transit is additional, typically 3 to 7 days by express. Sample costs are often credited against the first mass-production order, but confirm this in writing. If your formula needs new tooling or a custom capsule size, add 10 to 15 working days before sampling can start.

Mass production normally takes 20 to 35 working days after sample approval and receipt of deposit, depending on component availability and line scheduling. Printed cartons and custom bottles can add 10 to 20 working days if they are not in stock. Plan for a pre-shipment inspection or a third-party audit if your order value justifies it. Air freight takes 5 to 10 days door to door and suits pilot or launch volumes; sea freight takes 25 to 40 days port to port and is cost-effective above roughly 500 kg or 2 pallets.

Incoterms determine where your responsibility starts. EXW leaves everything to you from the factory gate. FOB covers export clearance and loading at the named Chinese port. DDP means the manufacturer or its forwarder delivers to your door with duties paid, which is convenient but usually carries a margin. Ask for a written quotation stating the Incoterm, port, validity period, and what is excluded, such as destination customs inspection or storage.

Standard shipping documents include the commercial invoice, packing list, bill of lading or air waybill, certificate of analysis, and a free-sale certificate where your market requires one. A material safety data sheet is provided for powders and certain extracts. Phytosanitary certificates apply only to plant-based raw materials where the destination requires them, not to every supplement. Confirm the document set before booking, because missing paperwork at destination can add weeks and demurrage.