Vitamins Resource Hub: Sourcing, Formulation and Production

Vitamin projects usually land in one of three formats. Two-piece capsules suit oil-free blends and dose ranges from 250 mg to 1,000 mg. Tablets handle higher actives and controlled release, typically 500 mg to 1,500 mg. Softgels carry oil-soluble vitamins such as D3 and K2, with fill weights from 300 mg to 1,200 mg. We run separate lines for each format, so switching between them does not require a full plant changeover.

Line capacity matters more than headline speed. A single tablet line can press 200,000 to 400,000 units per shift depending on size and coating. Capsule filling runs 60,000 to 120,000 units per shift. For a 30-day supply at 1,000 bottles, that is one to three production days plus coating, drying and packaging. Pilot runs from 500 units let you test stability and label claims before committing to a full batch.

Vitamin premixes vary widely in cost and stability. We source USP, BP or EP grade actives where available and confirm assay, particle size and flow before blending. Common inputs include ascorbic acid, cholecalciferol, dl-alpha tocopheryl acetate, retinyl palmitate and a range of B-complex salts. For gummies, pectin and gelatin bases change texture and shelf life, so we run a small trial before scaling.

Overages protect label claims through shelf life. A 24-month vitamin C tablet might carry a 10–20% overage; vitamin D3 in softgels often needs 20–30% because of degradation. We calculate overage from accelerated stability data, not guesswork. Clean-label requests are workable: no titanium dioxide, no synthetic colours, stevia or monk fruit sweetening, and vegan capsules. Each change affects cost and minimum batch size, so we quote both standard and clean-label versions.

Our facility is GMP-certified and holds ISO 22000 and HACCP. We are FDA-registered for US-bound dietary supplements. halal and vegan certifications are available for relevant formulas; certificate copies go out with the quotation pack. Every batch ships with a certificate of analysis covering identity, assay, micro and heavy metals. Retain samples are kept for the shelf life plus six months.

Export documentation is prepared in-house: commercial invoice, packing list, certificate of origin, health certificate and, where required, halal certificates. We ship FOB Shenzhen or Yantian, with air freight from Hong Kong for pilot runs. Typical sea transit is 18–28 days to US west coast, 25–35 days to EU ports and 12–20 days to Jebel Ali. Cartons are sized for standard pallets; private-label bottles can be shrink-wrapped or boxed.

Every vitamin batch is sampled at three points: incoming raw material, in-process blend, and finished goods. Identity testing by FTIR confirms each active, while potency is assayed by HPLC against a validated standard. Microbials (total plate count, yeast and mould, E. coli, Salmonella) are tested on every batch, and heavy metals (lead, arsenic, cadmium, mercury) are screened to EU and US Pharmacopoeia limits. Disintegration testing follows USP <701> for tablets and <711> for capsules, with results logged per lot.

A Certificate of Analysis (COA) is issued for each batch and includes the product name, lot number, manufacturing date, expiry date, tests performed, specification limits, results, and the analyst's signature. Retain samples of every lot are held for 24 months under controlled temperature and humidity, so any post-market query can be traced to the original material. Stability protocols follow ICH Q1A(R2) conditions: 25°C/60% RH for long-term and 40°C/75% RH for accelerated, with assays at 0, 3, 6, 12 and 24 months.

Documentation is compiled before release: batch record, raw-material COAs, in-process checks, finished-product COA, and deviation log if applicable. Buyers receive the COA as a PDF with the shipment, and hard copies can be inserted in the first carton on request. For markets requiring a free-sale certificate or GMP attestation, these are prepared alongside the batch file so the export paperwork is complete before the container leaves Guangdong.

Standard packaging options include HDPE bottles from 60 cc to 500 cc with induction seals and child-resistant closures, blister packs on PVC/PVDC or alu-alu for moisture-sensitive tablets, and stick packs or sachets for powder blends. Bottle labels are applied on a roll-fed line with a placement tolerance of ±1 mm; lot and expiry codes are inkjet-printed on the base or neck, and cartons are marked with the same lot for traceability. Carton specifications are typically 350 gsm kraft with a 5-ply corrugated shipper, and pallets are built to 1,200 × 1,000 mm or 1,200 × 800 mm depending on destination.

For US retail, labels must carry the Supplement Facts panel, serving size, amount per serving, percent daily value, other ingredients, and the mandatory allergen statement. We prepare artwork to the FDA 21 CFR 101.36 layout and can add Amazon FNSKU barcodes, expiration-date formatting (MM/YYYY), and batch codes as required by the retailer. For EU markets, the nutrition declaration and health-claim wording are checked against the EU Register before print, and we flag any claim that would need substantiation.

Retail-ready checks include barcode verification (GS1 or UPC), net-quantity compliance, and a final label proof signed off by the buyer. We do not print claims that are not supported by the formula or that require novel-food approval. If you supply your own dielines or label files, we run a pre-press check for bleed, font size and contrast, and return a marked-up proof within two working days.

Sampling starts with a brief and a formula review; stock samples ship in 3–5 working days, while custom pilot samples take 7–10 working days after formula approval. Pilot runs start from 500 units, subject to formula and packaging, and retail bottling MOQ is 1,000 units per SKU. Mass production runs 20–35 working days after sample approval and receipt of deposit, with the exact window confirmed once packaging components are in-house.

Air freight is typically 5–8 days door-to-door for urgent launches, while sea freight to Europe or the US takes 28–40 days port-to-port. We quote EXW, FOB Shenzhen or Hong Kong, and DDP for buyers who want a landed-cost figure. DDP quotes include duties and customs clearance but exclude any destination-specific supplement registration fees, which remain the buyer's responsibility.

Each shipment is accompanied by a commercial invoice, packing list, COA, MSDS where applicable, and a free-sale certificate for markets that require one. Phytosanitary certificates are provided only when a botanical ingredient triggers the requirement. Shipping documents are sent electronically within 24 hours of departure, and original documents follow by courier if a letter of credit requires them.