Quality Control Testing: In-Process & Finished Goods
Comprehensive QC testing for potency, identity, purity, and microbial limits. Ensure every batch meets your specifications before release.
Ayah Labs provides quality control testing for in-process and finished goods, including potency, identity, purity, and microbial limits testing. All testing follows USP methods and FDA 21 CFR Part 111 requirements. Signed CoA included with every batch.
Quality control testing is the systematic process of verifying that every batch of product meets established specifications before it is released for sale. For dietary supplement and cosmetic manufacturers, QC testing is both a regulatory requirement and a business imperative. A single out-of-specification batch reaching consumers can result in recalls, regulatory action, and lasting brand damage. Ayah Labs provides comprehensive QC testing services for in-process and finished goods.
In-Process Testing
In-process testing catches quality problems before they become finished goods failures. We test blend uniformity, in-process potency, and physical characteristics at key production stages. Early detection of out-of-specification results allows manufacturers to investigate root causes and take corrective action before committing to a full production run. Our scientists work with your quality team to define appropriate in-process test points and acceptance criteria.
Finished Goods Release Testing
Before any product leaves your facility, it must pass finished goods release testing. This includes label claim verification for all active ingredients, microbial limits testing per USP <61> and <62>, and any product-specific tests required by your specifications or regulatory requirements. Ayah Labs generates a signed Certificate of Analysis for each batch that documents all test results against acceptance criteria.
Regulatory Compliance
FDA 21 CFR Part 111 requires supplement manufacturers to test finished batches for identity and to verify that the product meets established specifications for purity, strength, and composition. Our testing programs are designed to satisfy these requirements and to provide the documentation needed for FDA inspections, retailer audits, and customer due diligence. We maintain complete chain-of-custody records for all samples.
Tests & Methods Included
- ✓ Label claim potency verification by HPLC
- ✓ Identity testing by FTIR and HPLC
- ✓ Microbial limits per USP <61>/<62>
- ✓ Heavy metal testing by ICP-MS
- ✓ Blend uniformity testing
- ✓ Dissolution and disintegration
- ✓ Moisture content
- ✓ Tablet/capsule weight variation
- ✓ Appearance and organoleptic testing
- ✓ Preservative efficacy testing
Regulatory Standards & Compliance
- USP
- FDA 21 CFR Part 111
- ISO 17025 Aligned
- GMP
Industries We Serve
- Supplement Manufacturers
- Cosmetic Brands
- Contract Manufacturers
- Private Label Brands
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Pricing depends on your product and test requirements. Tell us what you need and we will email a detailed quote within 24 hours.
Get a Quote →Frequently Asked Questions
What tests are required for finished dietary supplements?
FDA 21 CFR Part 111 requires identity testing and testing against established specifications for purity, strength, and composition. Most manufacturers also test for microbial limits, heavy metals, and label claim potency. Specific requirements depend on your product type, target market, and retailer requirements.
How do I know if my product passes QC testing?
Your Certificate of Analysis will show each test result compared to your acceptance criteria with a clear pass/fail determination. If any result is out of specification, we will notify you immediately and can provide technical consultation on investigation and disposition options.
Can you test both capsules and powder blends?
Yes. We test all dosage forms including capsules, tablets, softgels, powders, liquids, gummies, and topical formulations. Sample preparation methods are adapted to the dosage form to ensure accurate results.
Why manufacturers choose Ayah Labs for quality control testing
Fast turnaround
Signed CoA in 48–72 hours
Direct scientist access
Talk to the scientist running your tests
No minimums
1 SKU or 100 — same quality
Related articles
Batch Release Testing Under 21 CFR Part 111 — Required vs. Best Practice
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Raw Material TestingBuilding an Incoming Raw Material Testing Program — Specifications and Protocols
A well-designed incoming raw material testing program is the foundation of supplement and cosmetic quality. This guide covers how to write defensible specifications, design sampling plans, and structure testing protocols that satisfy 21 CFR Part 111 and ISO 22716 requirements.
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