Melatonin Tablet Manufacturer for Global Supplement Brands

Our rotary tablet presses run at up to 200,000 tablets per hour across multiple stations. For melatonin, we use 6 mm to 12 mm tooling to match your target dose and fill weight. Standard round tablets suit 1 mg to 5 mg doses, while oblong shapes handle 5 mg to 10 mg with fewer coating defects. We validate weight variation within ±3% and hardness between 4-8 kp, depending on your disintegration target.

Changeover between melatonin SKUs takes 4-6 hours, including hopper and die cleaning. That keeps small and mid-size runs practical. If you need film coating for colour or moisture protection, our coating pans handle 50-200 kg batches. We can also produce bi-layer tablets for combination formulas, such as melatonin with L-theanine or magnesium, in a single compressed unit.

Melatonin is sensitive to light, heat and oxidation. We use a direct compression or wet granulation process depending on the release profile. For immediate-release tablets, we blend melatonin with microcrystalline cellulose, dibasic calcium phosphate and a disintegrant such as croscarmellose sodium. A typical 5 mg tablet weighs 150-250 mg, giving enough mass for accurate dosing and a clean swallow.

For sustained-release versions, we use hydroxypropyl methylcellulose (HPMC) matrix systems to extend dissolution over 6-8 hours. We source melatonin from suppliers with US DMF or EU CEP documentation where required. Each batch is tested for assay, related substances and residual solvents. If your market requires organic or non-GMO claims, we can quote or vegan-certified melatonin lots, subject to supply at the time of order.

Every melatonin batch is tested in-house for identity, assay, dissolution, uniformity of dosage units and microbial limits. We retain samples for 12 months after the shelf life. Our facility is GMP-certified, ISO 22000 and HACCP compliant, and we can provide halal certificates for the finished product when requested. We do not claim FDA approval; our plant is FDA-registered for dietary supplements.

For export, we prepare a Certificate of Analysis (CoA), Certificate of Free Sale, and MSDS where applicable. We ship from Shenzhen or Hong Kong ports, with air freight for samples and sea freight for palletised orders. Standard packaging is 60-120 count HDPE bottles with induction seals, or blister packs for unit-dose formats. Lead time for mass production is 20-35 working days after you approve the sample and artwork.

Every melatonin tablet batch is tested at three stages: incoming raw material, in-process compression, and finished product. Raw melatonin is assayed for identity and potency by HPLC, with a specification of 99.0-101.0% of label claim. In-process checks every 30 minutes cover tablet weight, hardness, thickness and friability. Finished tablets are tested for potency, uniformity of dosage units, disintegration, microbial limits, and heavy metals (lead, arsenic, cadmium, mercury). Disintegration for immediate-release tablets is typically under 15 minutes in purified water at 37°C.

The certificate of analysis (COA) issued with each batch lists the product name, batch number, manufacturing date, expiry date, and results for each test against specification. It includes the analytical methods used (HPLC for potency, USP <2021> for microbials, ICP-MS for heavy metals) and the release decision. A retention sample of at least twice the quantity needed for full testing is kept for the shelf life plus six months. Stability protocols follow ICH Q1A(R2) conditions: 25°C/60% RH for long-term and 40°C/75% RH for accelerated, tested at 0, 3, 6, 9, 12, 18 and 24 months.

Microbial testing covers total aerobic count, yeast and mould, E. coli, Salmonella, and Staphylococcus aureus, with limits set to the destination market's pharmacopoeial or dietary supplement requirements. Heavy metals are tested per batch, not just per raw material lot, because compression excipients can contribute. Disintegration and dissolution (where a method exists) are performed on finished tablets. All testing is done in-house or at a contracted ISO 17025 laboratory, and the laboratory name appears on the COA. Batch records are retained for five years and are available for audit by the brand owner or a nominated third party.

For sustained-release melatonin tablets, an additional dissolution profile is run at 1, 2, 4, 6 and 8 hours to confirm the release curve matches the validated formula. The COA for these batches includes the dissolution results at each time point. If your market requires a specific monograph, such as the USP monograph for melatonin tablets, the testing panel is adjusted to include the additional identification and assay steps. We do not release a batch until all tests are complete and the quality unit has signed off.

Melatonin tablets are packed in HDPE bottles with induction seals and child-resistant closures where required, in PVC/PVDC or alu-alu blisters, or in single-dose sachets. Bottle sizes range from 30 cc to 500 cc, holding 30 to 500 tablets. Blister cards are typically 10, 12 or 14 tablets per card, with cartons holding 1, 2 or 3 cards. Stick packs and sachets are available for powder or granule formats but not for compressed tablets. We can apply desiccant canisters or silica gel sachets to control moisture during shipping.

For the US market, labels must include the statement of identity, net quantity of contents, supplement facts panel with serving size and percent daily value, other ingredients list, and the manufacturer/distributor name and address. We print lot number and expiry date by inkjet or laser coding on the bottle, carton and shipper. Expiry dating is typically two years from the date of manufacture, supported by the stability protocol. We can also add batch-specific QR codes that link to the COA if your retail partner requires traceability.

Cartons are specified to withstand export handling: single-wall or double-wall corrugated, with a maximum gross weight of 20 kg per carton for manual handling. Palletisation is standard 1,200 x 1,000 mm or 1,200 x 800 mm, stretch-wrapped and strapped, with a maximum height of 1.8 m including pallet. For Amazon FNSKU labelling, we can apply the FNSKU barcode label over the existing barcode or print it directly on the carton, and we follow Amazon's carton labelling and pallet configuration requirements. Retail compliance for EU markets includes the address of the responsible person and allergen declaration where applicable.

We do not print marketing claims on labels without your written approval and supporting substantiation. All artwork is checked against the destination market's labelling regulations before printing, and a PDF proof is sent for sign-off. Plate and cylinder costs for printed cartons are quoted separately. If you supply your own packaging components, we can run them on our lines after a line trial to confirm compatibility with tablet size and count.

Sampling for melatonin tablets takes 7-10 working days from receipt of your formula brief and artwork. The sample is produced on the same compression equipment as mass production, so tablet size, hardness and finish are representative. Mass production runs 20-35 working days after sample approval and receipt of packaging components. The lower end of that window applies to standard round tablets in stock bottle sizes; the upper end applies to sustained-release formulas, custom tablet shapes, or printed cartons that require new plates.

Shipping is by air or sea depending on volume and urgency. Air freight from Guangdong to Europe or North America typically takes 5-8 days door to door for orders under 500 kg. Sea freight takes 25-35 days port to port, with full container loads (FCL) more economical above 15-20 cubic metres. We quote EXW, FOB Shenzhen or Hong Kong, and DDP for most destination countries. DDP pricing includes duties and customs clearance but requires your importer of record details and a confirmed HS code, which for melatonin tablets is usually 3004.90 or 2106.90 depending on the market's classification.

Documents provided with each shipment include the commercial invoice, packing list, bill of lading or air waybill, certificate of analysis for each batch, material safety data sheet (MSDS), and a free-sale certificate issued by the local authority where required by your market. For markets that require a phytosanitary certificate, we can arrange it if the product contains botanical ingredients, but melatonin is synthetic and normally does not require one. A certificate of origin can be issued for preferential tariff treatment under applicable trade agreements.

We recommend booking shipping space at least two weeks before the production completion date to avoid rollovers during peak season. For repeat orders, we hold your approved artwork and packaging specifications on file, which reduces the pre-production approval step to a single confirmation. Payment terms are typically 30% deposit with the balance against the bill of lading copy, and we can discuss letter of credit terms for orders above a certain value.