Quality Control

Quality Control

Tianz Healthcare Supplement Co., Ltd. applies a structured quality control approach throughout material receiving, production, finished-product inspection, packaging, and shipment. Our procedures are designed to support the consistent manufacture of vitamins, minerals, amino acids, proteins, herbal and plant-based supplements, collagen, fish oil, dietary fiber, sports nutrition, beauty supplements, and other nutritional products. Inspection requirements are defined according to the product formulation, dosage form, customer specifications, and applicable market expectations.

1. Incoming Material Inspection

Raw materials and packaging components are checked before they are released for production. Purchasing specifications, supplier documentation, and internal inspection requirements are reviewed to help confirm that each incoming lot is suitable for its intended use.

• Material verification: Product name, batch information, quantity, appearance, and supporting documents are reviewed upon receipt.
• Specification checks: Identity, purity, active ingredient content, moisture, microbiological indicators, heavy metals, or other relevant parameters may be assessed according to the material and product requirements.
• Packaging component inspection: Bottles, caps, labels, pouches, cartons, scoops, seals, and other components are checked against approved specifications.
• Status identification: Materials are identified and controlled according to their inspection or release status to reduce the risk of unintended use.

2. In-Process Quality Control

Production activities are monitored at defined stages to maintain consistency between batches. Manufacturing instructions and process parameters are established according to the characteristics of each formula, including vitamin and mineral blends, protein powders, herbal products, collagen supplements, amino acid products, and liquid nutrition products.

• Weighing and dispensing controls: Materials are checked against production documents before batching.
• Mixing and processing checks: Blending time, sequence, appearance, uniformity, temperature, and other relevant parameters are monitored where applicable.
• Dosage consistency: Fill weight, tablet weight, capsule weight, liquid volume, or serving quantity is checked according to the selected product format.
• Line clearance and identification: Materials, labels, and production areas are verified during product or batch changeovers to help prevent mix-ups.
• Process records: Key production and inspection information is documented to support batch review and traceability.

3. Finished Product Inspection

Finished supplements are evaluated against approved product specifications before release. The inspection plan is adjusted to the formulation and dosage form, with testing performed internally or through qualified external resources when appropriate.

• Physical and sensory characteristics: Appearance, color, odor, taste, texture, and product condition are reviewed as applicable.
• Product measurements: Weight, volume, count, disintegration, moisture, or other dosage-form-specific characteristics may be checked.
• Composition-related testing: Active ingredients, nutritional parameters, microbiological indicators, contaminants, and other relevant items may be assessed subject to product specifications and customer requirements.
• Documentation review: Batch records and inspection results are reviewed before the product proceeds to final release and shipment preparation.

4. Packaging and Pre-Shipment Checks

Packaging is inspected to help protect product quality during storage and transportation while ensuring that the supplied goods match the confirmed order. This is particularly important for private-label and OEM/ODM supplement projects involving customized containers, labels, cartons, and market-specific information.

• Packaging integrity: Containers, closures, seals, pouches, and outer cartons are checked for condition and proper assembly.
• Label verification: Product names, ingredient information, serving directions, lot identification, date coding, and approved artwork are reviewed against confirmed files.
• Order conformity: Product format, flavor, package size, quantity, and shipping marks are checked against the order requirements.
• Pre-shipment review: Finished cartons and shipping documentation are examined before dispatch to reduce avoidable delivery discrepancies.

5. Feedback, Corrective Action, and Continuous Improvement

Tianz Healthcare Supplement Co., Ltd. treats quality control as an ongoing process. Customer feedback, production observations, inspection findings, and supplier-related issues are recorded and reviewed by the responsible teams. When a nonconformity is identified, affected materials or products are controlled, the issue is investigated, and appropriate corrective or preventive actions are considered.

Inspection methods, operating procedures, supplier performance, and production controls are reviewed as needed to improve consistency and support changing product specifications. For customized supplement projects, our team also communicates with customers regarding formulas, packaging requirements, testing expectations, and documentation so that quality criteria are clearly defined before manufacturing begins.