TL;DR: Brands and manufacturers searching for a third-party supplement testing lab should prioritize accreditation, turnaround time, transparent pricing, and direct experience in the wellness industry.
Third-party testing serves a crucial regulatory and commercial purpose in the wellness space. Laboratory verification of the composition, potency, and shelf life of products protects your brand from compliance issues and increases consumer confidence. That said, choosing a lab partner is about much more than finding one capable of running the necessary tests.
The right laboratory understands how third-party testing fits into the larger manufacturing process and how costs, time-to-results, and data insights work together to impact your bottom line.
Before you submit your next batch of samples, ask these questions:
1. What Are the Lab’s Credentials?
The FDA requires scientifically valid, appropriately controlled testing for supplement products. Laboratories with an ISO/IEC 17025 accreditation meet internationally recognized requirements for technical competence and quality management. For manufacturers, working with an accredited laboratory provides built-in confidence that test results will stand up to scrutiny.
Before deciding to partner with a lab, ask whether it is accredited and what falls within its accredited scope. Laboratories must demonstrate competence in specific testing methods, so make sure that the services you need are covered.
A lab with a broad range of accredited methods will be more likely to continue meeting your needs as your product line evolves.
2. Can the Lab Perform the Tests You Need?
Different laboratories have different capabilities. Begin your search for a third-party testing partner by listing out your needs. Depending on your products and quality program, this may include:
- Vitamin testing
- Heavy metals and minerals
- Pesticide residues
- Amino acids
- Microbial testing
- Allergen testing
- Pathogen identification
- Ingredient identity testing
- Preservative effectiveness testing (PET)
Product format is another important consideration. Powders, gummies, capsules, soft gels, and tinctures may require distinct testing methods, and not every laboratory is equally prepared to deliver valid results across SKUs.
Asking questions about a potential lab’s full range of capabilities up front can prevent expensive delays and compliance gaps in the future.
3. What is the Lab’s Standard Turnaround Time for Results?
Turnaround time has a direct impact on your production schedule.
Delayed test results can cause fulfillment issues, create storage backups, and disrupt cash flow. Long testing windows also make it harder to respond if you are surprised by an out-of-spec result.
Most laboratories offer rush testing options, but they aren’t available in all scenarios and come at a premium price. For this reason, a lab’s standard turnaround time usually means more to manufacturers than its ability to fast-track results in an emergency.
Standard turnaround times of 7-10 business days are common in the supplement testing industry, but some facilities, like Advanced Laboratories, offer 5-day standard results by processing samples in the order they are received rather than batching them.
Fast, reliable testing keeps business moving and allows for flexibility in the event of an unexpected result.
4. Is Pricing Transparent and Competitive?
Third-party testing is an important part of any manufacturing budget, but higher costs don’t necessarily mean more trustworthy results.
When comparing laboratories, look beyond a single quoted price to learn what is (and isn’t) included. If there are additional charges for reporting, retesting, rush service, or other necessities, make sure you aren’t caught off guard.
It can also be useful to compare the total cost of routine testing across providers. If you’re submitting dozens or hundreds of samples each year, even a modest difference in per-sample pricing can have a significant impact on your annual testing budget. A 2025 comparison revealed that many supplement manufacturers are overpaying by up to 65% on vitamin testing alone.
Evaluate price alongside considerations like accreditation, capabilities, speed, and service offerings to get a full picture of the value a supplement testing lab provides.
Finally, look for transparency. Advanced Laboratories publishes its full testing price list; many labs do not.
5. How Does the Lab Handle Out-of-Spec (OOS) Results?
In a perfect world, your testing results will consistently meet expectations. If you ever encounter issues with a batch, however, it’s important to know what happens next.
Ask prospective laboratories:
- How you will be notified of an OOS result
- Whether retesting is available
- If you will be charged for retesting
- How results are documented and whether it’s possible to track data trends
A clear process can prevent an unexpected finding from turning into a costly delay or surprise expense.
At Advanced Laboratories, microbiological and most other OOS results are automatically retested before the final report is issued. Knowing that the initial finding has already been confirmed can save valuable time and guide your next steps in investigating out-of-spec results.
6. How Will I Access and Manage Testing Data?
Each test generates much more than a single result. Over time, supplement manufacturers can accumulate certificates, historical results, sample records, invoices, and a wealth of other documentation.
When these records are scattered across email attachments and shared folders, finding the right data point for an audit, retailer request, or internal review becomes a time-consuming task.
Ask whether your laboratory provides a centralized way to access your testing records. A robust data-management platform, like Advanced Laboratories’ TrendCheck®, offers manufacturers continuous access and makes data easily searchable. Better insights make it possible to track samples in process, retrieve certificates, flag OOS results, and export results to notice and respond to trends.
For manufacturers managing testing across multiple products and batches, centralized data access can make both administrative tasks and quality control considerably easier.
7. Does This Lab Understand the Supplement Industry?
Labs that routinely process other consumer products may not be prepared to meet a supplement manufacturer’s unique needs.
Dietary supplements come in a wide range of formulations and formats, from vitamin capsules and mineral products to protein powders, pre-workouts, gummies, liquids, and botanical products. Different ingredients and matrices can create specialized testing considerations.
A partner with substantial experience serving supplement manufacturers is more likely to be familiar with the testing workflows, sample types, analytical methods, and quality requirements you need. Moreover, they are more likely to understand the role of third-party testing in your business’s big-picture needs.
It’s wise to ask how much of a prospective lab’s testing work focuses on dietary supplements, and how much experience they have with products similar to yours. A laboratory that understands the supplement manufacturing industry can often anticipate issues earlier, communicate results more effectively, and help prevent delays in product release.
