Why Supplement Quality Control Testing Matters for Brand Owners

At SREKE, we understand that rigorous quality control testing is the foundation of a trustworthy dietary supplement brand. For brand owners, the difference between a product that supports consumer confidence and one that risks recalls or regulatory action often comes down to testing methodology. In an industry where FDA cGMPs (21 CFR Part 111) and international standards like ISO 22000 and HACCP mandate verified quality, understanding testing methods is not just a compliance step—it is a strategic advantage.

Our facility in Guangzhou implements a multi-layered testing protocol for every batch we produce, from incoming raw material verification to finished product release. We compare methods such as HPLC, GC-MS, FTIR, and microbiological assays to ensure we select the most accurate, efficient, and cost-effective approach for each ingredient and final formulation.

Key Manufacturing Considerations at SREKE

Identity and Purity Testing

• FTIR (Fourier-Transform Infrared Spectroscopy): We use FTIR for rapid identity confirmation of raw materials and active ingredients. It is a fast, non-destructive method that verifies molecular structure against reference standards.
• HPLC (High-Performance Liquid Chromatography): For potency and purity, HPLC is our primary tool. It quantifies active compounds, detects impurities, and ensures label claims match actual content—critical for compliance with FDA cGMP and USP standards.
• GC-MS (Gas Chromatography-Mass Spectrometry): We employ GC-MS for volatile compounds, residual solvents, and pesticide residue testing, providing the sensitivity required for safety and regulatory compliance.

Microbiological and Heavy Metal Testing

• Microbial Assays: Our in-house lab performs total aerobic count, yeast, mold, and specific pathogen testing (E. coli, Salmonella) according to USP <61> and <62> chapters.
• Heavy Metal Analysis: Using ICP-MS (Inductively Coupled Plasma Mass Spectrometry), we test for lead, arsenic, cadmium, and mercury to meet stringent limits set by FDA, EFSA, and Prop 65.

Formulation and Packaging Compatibility

At SREKE, we consider how testing integrates with your formulation and packaging choices. We conduct stability testing under ICH guidelines to ensure product integrity across shelf life, and we evaluate packaging materials for compatibility and protection against moisture and light.

How SREKE Helps You Get to Market Faster

Our streamlined OEM/ODM process is designed to reduce time-to-market without compromising quality. We maintain a lean MOQ structure for standard formulations and offer flexible packaging options to accelerate launch timelines. By parallel-processing testing and manufacturing, we typically reduce lead times by 30–40% compared to industry averages.

We provide transparent documentation of all test results, including Certificates of Analysis (CoA), which you can share with your regulatory or quality teams. Our team also assists with compliance documentation for FDA, Health Canada, and other global markets.

Industry Trends and Market Opportunities

• Increased Demand for Third-Party Verification: Brands are increasingly seeking independent lab testing to build consumer trust. We offer optional third-party testing through accredited partners.
• Advanced Analytical Techniques: Adoption of LC-MS/MS and NIRS (Near-Infrared Spectroscopy) is growing for faster, more precise testing. We invest in these technologies to stay ahead of industry standards.
• Transparency and Traceability: Consumers and regulators demand full ingredient traceability. Our ERP system tracks every batch from raw material to finished product, supporting audit readiness.

Frequently Asked Questions

What is the difference between HPLC and GC-MS testing?

HPLC is ideal for non-volatile and thermally unstable compounds, while GC-MS is better suited for volatile substances and residual solvents. At SREKE, we select the method based on the ingredient profile and regulatory requirements.

How long does quality control testing take?

Standard identity and potency testing typically takes 5–7 business days. Comprehensive testing, including microbiological and heavy metal analysis, may require 10–14 days. We provide expedited options for urgent launches.

Do you test for pesticides and heavy metals?

Yes. We conduct routine testing for pesticides (using GC-MS/LC-MS/MS) and heavy metals (using ICP-MS) to comply with FDA, EFSA, and USP standards. CoAs are provided for every batch.

What is your MOQ for custom formulations?

Our MOQ varies by product type: softgels and capsules start at 10,000 units, tablets at 5,000 units, and powders at 1,000 kg. We offer flexible ODM solutions for smaller brands.

Can you help with regulatory compliance for international markets?

Absolutely. Our team has extensive experience with FDA cGMP, EU Novel Food regulations, Health Canada NPN, and other global standards. We provide documentation support and can guide formulation adjustments for compliance.

Ready to launch your supplement brand? SREKE provides GMP-certified OEM/ODM manufacturing for softgels, capsules, tablets, powders, gummies, and liquids. Contact us for a free quote or email [email protected] — we respond within 24 hours.