How to Find Supplement Manufacturers That Fit Your Order

A capsule line and a gummy line are not interchangeable. Before requesting quotes, confirm the manufacturer runs your dosage form in-house rather than brokering it. Ask for the number of lines, typical batch size and changeover time. If your forecast is 5,000 units per SKU, a plant set up for 50,000-unit runs will either decline or price you out. Pilot runs of a few hundred units are common for market testing, but expect higher per-unit cost and a separate schedule.

Volume also decides packaging. Retail bottling, stick packs and blister packs need different equipment. A factory that fills 100-count bottles may not offer 30-count blisters without a tooling charge. Ask what fill weights and counts the line handles without new tooling, and whether the MOQ applies per SKU or per purchase order. Getting this in writing before sampling avoids a redesign three weeks into production.

Some manufacturers only produce to your finished formula. Others keep a library of stock formulas you can license and adjust. Both models work, but they change your timeline and your regulatory workload. If you bring your own formula, ask how the plant handles ingredient qualification, allergen screening and overage for potency loss. A 500 mg label claim may need 520-550 mg of input to still pass assay at end of shelf life.

Ingredient provenance matters more in some markets than others. EU buyers often need documentation for novel food or health claim review. Middle East buyers frequently require halal certification on the finished product, not just the gelatin capsule. US buyers may want organic or non-GMO documentation. Ask which ingredients the plant holds in stock and which are sourced per order, since custom sourcing can add 10-15 days to the lead time.

Certificates are a starting point, not proof. Request the current GMP certificate, ISO 22000 scope and HACCP plan summary, and check the expiry dates. Ask who performs finished-product testing and whether third-party lab reports come with each batch. A manufacturer that cannot provide a certificate of analysis, a specification sheet and a material safety data sheet on request is a risk you do not need to take.

Logistics decides your landed cost as much as the unit price. Confirm Incoterms, whether the factory handles export documentation, and typical transit times to your port. Air freight from Guangdong to the US or EU runs 5-10 days; sea freight runs 25-40 days. Ask whether the plant ships full containers or consolidates LCL, and who covers duties. A clear handover at the port is better than a vague promise of door delivery.

Every batch should be tested for identity, potency, microbials, heavy metals and disintegration before release. Identity testing confirms the raw material matches the specification, typically by HPLC or FTIR. Potency assays verify the active marker compound is within 95-105% of label claim. Microbial testing covers total aerobic count, yeast and mould, E. coli and Salmonella. Heavy metals testing screens for lead, arsenic, cadmium and mercury against USP <232> limits. Disintegration testing applies to tablets and capsules, with a typical specification of under 30 minutes in purified water at 37°C.

Testing happens at three points: incoming raw materials, in-process checks and finished goods. A certificate of analysis for each batch should list the test parameter, method reference, specification, result and pass/fail status. It should also include the batch number, manufacturing date, expiry date, and the name and signature of the quality control manager. Ask whether the manufacturer performs testing in-house or outsources to a third-party laboratory. In-house labs reduce turnaround time, but third-party ISO 17025 accredited labs provide an independent paper trail that some retailers prefer.

Retention samples are a useful indicator of quality discipline. A reliable supplement manufacturer keeps a retained sample from every batch for at least one year past the expiry date, stored under label conditions. Ask to see the retention sample policy and the storage log. Stability protocols should include accelerated testing at 40°C and 75% relative humidity for six months, plus real-time testing at 25°C and 60% relative humidity for the product's shelf life. If a manufacturer cannot provide a stability summary for a similar formula, treat the quoted expiry date as provisional.

Packaging format affects cost, MOQ and lead time. High-density polyethylene bottles are the most common for capsules and tablets, available in 60cc to 500cc sizes with induction seals and child-resistant closures. Blister packs suit unit-dose tablets and allow tamper evidence but carry higher tooling costs. Stick packs and sachets work for powders and single-serve liquids, with fill weights from 2g to 30g. Gummies typically require PET or glass jars with a pressure-sensitive seal. Confirm whether the manufacturer supplies packaging in-house or sources it, as external sourcing adds 10-15 working days to the schedule.

For the US market, the label must include a statement of identity, net quantity of contents, a supplement facts panel, other ingredients list, and the name and place of business of the manufacturer or distributor. Allergen declarations are required under FALCPA. Lot codes and expiry dates must be printed or embossed on the primary container and, for retail, on the carton. Ask the manufacturer to provide a label proof with dieline and barcode placement before printing. A common error is a supplement facts panel that does not match the batch record, so cross-check the two documents before approving artwork.

Carton and pallet specifications should be agreed in writing. Standard export cartons hold 12 to 48 units depending on bottle size, with a maximum gross weight of 15kg for manual handling. Pallet configurations vary by market: a standard US pallet is 1,200mm by 1,000mm, while a Euro pallet is 1,200mm by 800mm. For Amazon FBA, the manufacturer should apply FNSKU labels, poly-bag units where required, and a carton label with box contents and expiry. Confirm whether the manufacturer handles this or whether a prep centre is needed, as this affects the landed cost.

Sample timelines depend on whether the formula is stock or custom. For a stock formula, samples typically ship in 7-10 working days. For a custom formula, add 5-7 working days for formulation and pilot batching. Sample costs are usually credited against the first production order, but confirm this in writing. Production windows run 20-35 working days after sample approval and receipt of deposit, with gummies and softgels at the longer end due to drying and curing stages. Chinese New Year and October holidays add two to three weeks, so plan orders around these periods.

Shipping method should be chosen on cost per kilogram and transit time. Air freight takes 5-10 days door to door and suits pilot runs or urgent replenishment, but costs roughly four to six times more per kilogram than sea freight. Sea freight takes 25-40 days depending on the port pair and whether it is a full container or less-than-container load. For first orders under 500kg, air or express courier is often more economical once warehousing and customs clearance at destination are included. Ask for a landed cost estimate rather than an FOB price alone.

Incoterms define where responsibility transfers. EXW means the buyer arranges everything from the factory gate. FOB means the manufacturer delivers to the named port and covers export clearance. DDP means the manufacturer delivers to the buyer's door with duties paid, which simplifies budgeting but usually carries a higher unit price. Standard documents include the commercial invoice, packing list, bill of lading or air waybill, certificate of analysis, material safety data sheet where relevant, and a free-sale certificate. Phytosanitary certificates apply only to botanical raw materials, not finished supplements.