Vitamin B12 Liquid Manufacturer for Private Label Brands

Liquid filling lines run at 30,000 bottles per day across 15 ml, 30 ml and 60 ml amber glass and PET. Each line carries inline fill weight verification to ±1.5%, with reject stations for underfill and cap torque faults. Dropper assemblies, spray pumps and tamper-evident closures are stocked for standard 18 mm and 20 mm necks. Changeover between SKUs takes 4–6 hours, which keeps multi-SKU orders practical for brands launching two or three strengths at once.

Bulk liquid B12 concentrate is held in stainless steel vessels under nitrogen to limit oxidation. Batches are filtered at 0.45 micron before filling. For brands scaling from a 1,000-unit pilot to 5,000-unit retail runs, the same equipment and QC parameters apply, so formulation and fill weight stay consistent between the pilot and the commercial batch. Lead time for mass production is 20–35 working days from approved sample and purchase order.

Vitamin B12 is stable in liquid when the base and pH are controlled. We formulate at pH 4.5–6.5 for methylcobalamin and 4.0–5.5 for cyanocobalamin, using glycerin, purified water or a glycerin-water blend. Alcohol-free and sugar-free bases are available. Typical actives range from 500 mcg to 5,000 mcg per 1 ml serving. We can combine B12 with B6, folate, biotin or electrolytes in one dropper or spray format without compromising clarity.

Flavour systems are matched to the active. Methylcobalamin carries a natural cherry or berry note well; cyanocobalamin is neutral and suits unflavoured or lightly sweetened bases. Stevia, monk fruit and erythritol are used at 0.2–0.8% to keep taste clean without adding sugar. Preservative systems include potassium sorbate and sodium benzoate at standard beverage levels, or a preservative-free hot-fill option for brands targeting clean-label claims.

Each batch is tested for assay, pH, microbial limits, heavy metals and fill weight before release. Certificates of analysis are issued per lot. Stability testing runs at 25°C/60% RH and 40°C/75% RH for 6 and 12 months, with accelerated data available for retail submissions. The facility is GMP-certified and holds ISO 22000 and HACCP. Halal and vegan certification can be arranged where the formula and capsule or bottle components meet the relevant standard.

Export documentation covers commercial invoice, packing list, certificate of origin, health certificate and, where required, halal certificates. We ship FOB Shenzhen or Yantian, with air freight for pilot runs. Typical retail carton configuration is 24 or 48 bottles per shipper. EU, UK and US labelling support includes ingredient declarations, allergen statements and supplement facts panel formatting.

Every batch of liquid vitamin B12 undergoes identity testing by HPLC to confirm the correct cobalamin form and potency within a 95.0–105.0% label claim range. Microbial testing covers total aerobic count, yeast and mould, E. coli and Salmonella, with results available within 72 hours. Heavy metals (lead, arsenic, cadmium, mercury) are screened against EU and US pharmacopoeial limits. For liquids, we also test pH, viscosity and fill weight at start, middle and end of the filling run.

A Certificate of Analysis (COA) is issued per batch and includes batch number, manufacture and expiry dates, specification results, and a signed release statement. Retention samples of each batch are kept for two years at controlled temperature. Stability protocols follow ICH guidelines: 25°C/60% RH for 24 months, with accelerated testing at 40°C/75% RH for six months. Real-time data is available on request for ongoing projects.

Disintegration testing does not apply to liquids, but we verify homogeneity and absence of sedimentation after 30 days of storage. Preservative efficacy testing (PET) is performed if the formulation contains preservatives, using the ISO 11930 method. All testing is conducted in-house or at accredited third-party laboratories, and raw material COAs are retained for traceability. Documentation packages can be tailored to your market's regulatory requirements.

We offer dropper bottles in amber or clear glass, 15 ml, 30 ml and 60 ml, with tamper-evident droppers and child-resistant caps. Spray pumps are available for 20 ml and 30 ml formats. For single-serve convenience, stick packs and sachets from 5 ml to 10 ml can be produced on separate lines. Cartons are printed with lot number and expiry date using inkjet or laser coding, and each carton carries a linear barcode (UPC or EAN) as required.

For the US market, labels include the FDA dietary supplement facts panel, ingredient list, allergen statement, and 'Keep out of reach of children' warning. We can pre-press labels to your artwork, or design basic layouts if needed. For Amazon FNSKU labelling, we apply the FNSKU barcode over the original barcode or on the carton as specified. Retail-ready packaging options include shelf-ready trays and shrink-wrap for club stores.

Pallet specifications are built to your retailer's requirements: standard 1200x1000 mm or 1200x800 mm pallets, with maximum height 1.8 m, and stretch-wrapped and corner-protected. We provide packaging specifications and dielines for your approval before production. If you supply your own bottles or labels, we can accommodate customer-supplied components after a compatibility check.

The standard MOQ is 1,000 units per SKU for market testing. Sample lead time is 7–10 working days after receipt of your formulation brief and any custom artwork. Mass production takes 20–35 working days after sample approval and receipt of deposit. These timelines assume standard bottle and label components; custom tooling or imported components may add 2–3 weeks.

We ship via air freight for urgent orders (5–10 days door-to-door) or sea freight for larger volumes (25–40 days depending on destination). Incoterms offered include EXW, FOB Shenzhen or Hong Kong, and DDP for select countries. Shipping documents provided include commercial invoice, packing list, bill of lading or airway bill, COA, MSDS, and a free-sale certificate. For some destinations, a phytosanitary certificate or certificate of origin can be arranged.

Order progress is tracked through a shared production schedule, with photo updates at key milestones: raw material receipt, filling, labelling and packing. We recommend booking sea freight at least two weeks before production completion to avoid delays. For repeat orders, we keep your formulation and artwork on file, reducing lead time by 3–5 days.