ISO 17025 vs Non-Accredited Labs: Why It Matters for Supplement Testing

Subtitle: "We follow ISO methods" and "We ARE ISO accredited" are not the same sentence.

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Let's say you get two lab quotes for the same heavy metals panel. Lab A charges $450. Lab B charges $180.

Lab A's quote says "ISO/IEC 17025:2017 Accredited — ANAB Certificate # AT-1234." Lab B's website says "We follow ISO 17025 guidelines."

Are you saving $270, or are you buying a piece of paper nobody will accept?

Spoiler: you're probably buying expensive kindling. And when Amazon asks for accredited third-party test results — which they do, aggressively, for supplements — that $180 report from the "guidelines" lab won't save your listing. You'll be back to square one, out $180, and scrambling.

Let me break down what accreditation actually means, why it's not just a fancy logo, and when you can actually get away with using a non-accredited lab (spoiler: almost never).

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ISO 17025 in One Paragraph (No, Really)

ISO/IEC 17025 is the international standard for testing and calibration laboratories. It says: "If you want to call yourself a competent lab, here's what you need to do."

It covers everything from how technicians are trained to how instruments are calibrated to how results are reported. A third-party accreditation body (like ANAB, A2LA, IAS, or Perry Johnson in the US) comes to the lab, watches them work, audits their records, sends them blind samples to test, and verifies they actually know what they're doing.

Here's the crucial part: accreditation is scope-specific. A lab can be accredited for lead testing by ICP-MS but NOT accredited for microbial testing. You have to check their scope of accreditation — not just their certificate number. I've seen brands submit "accredited" COAs for yeast and mold that weren't covered by the lab's scope. The retailer rejected it. The brand was baffled. The lab was legally fine — they never claimed mold was in scope.

Accreditation isn't a blanket endorsement. It's a list of specific tests the lab has proven they can do correctly. Read the fine print.

⚠️ Scope of Accreditation is Everything

A lab's ISO 17025 certificate is like a menu, not a restaurant rating. They might be accredited for five things and offering 50. The other 45 are being done by the same technicians with the same equipment, but there's been no external audit of those methods. Always check what's actually on their scope. Most accreditation bodies have searchable databases online.

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"We Follow ISO Methods" = We Are Not Accredited

This is the weasel phrase of the lab industry. And I hear it constantly.

A lab that says "we follow ISO 17025 guidelines" is saying: "We've read the standard. We think we're doing what it says. Nobody has verified this."

That's fundamentally different from "we are ISO 17025 accredited," which means: "An independent third party has physically inspected our facility, reviewed our documentation, tested our technicians, and certified that we meet the standard."

The difference is the external audit. Without it, anyone can claim anything.

Think of it this way: "I follow FDA food safety guidelines" vs. "The health department inspected my restaurant and gave me an A." One is a claim. The other is verification.

Non-accredited labs can still produce accurate results. Some are excellent. But the buyer of those results — Amazon, a retailer, the FDA — has no way to distinguish the good non-accredited labs from the bad ones. So they just reject them all.

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Why Accreditation Matters: The People Who Actually Care

Amazon

Amazon's Supplement Compliance Requirements explicitly state that testing must come from "ISO 17025 accredited laboratories." If you submit a COA from a non-accredited lab for your compliance documentation, Amazon will reject it. If you're fighting a listing reinstatement, non-accredited results won't even get you a reply. The drone doesn't read nuance. It looks for the accreditation number.

The FDA

The FDA doesn't technically require ISO 17025 accreditation in the GMP regulations (21 CFR 111). But here's what they DO require: you must use "scientifically valid" methods and your lab must be "competent." During an inspection, if the investigator asks how you verified your lab's competence and your answer is "they said they're good," you're getting a 483 observation. An ISO 17025 accreditation is the universally accepted proof of lab competence. It's not legally required, but it's practically required if you want a clean inspection.

Retailers (Walmart, Target, Whole Foods, CVS, etc.)

Every major retailer requires accredited third-party testing as part of their vendor qualification. No accreditation = no shelf placement. They've been burned too many times by brands with sketchy in-house testing. Their compliance teams have exactly one checkbox for lab qualification: "ISO 17025 accredited? Y/N." If the answer is N, the conversation ends.

Your Liability Insurance

Plaintiff's attorneys love non-accredited testing. In a lawsuit, the opposing counsel will ask: "Mr. Supplement Brand Owner, you chose to use a lab that was never independently audited, even though accredited labs were available. Why?" There's no good answer to that question. An accredited lab report is a shield. A non-accredited report is a target.

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How to Verify a Lab's Accreditation (30 Seconds)

1. Look at the lab's COA or website for their accreditation certificate number. It'll look something like "ANAB AT-1234" or "A2LA 5678.01."

2. Go to the accreditation body's website. For ANAB, it's anab.org. For A2LA, a2la.org. For IAS, iasonline.org. For Perry Johnson, pjla.com.

3. Search the lab's name or certificate number in their directory.

4. Check the scope — the list of specific tests they're accredited for. Make sure your tests are on it.

5. Check the expiration date. Accreditations expire and labs have to get re-assessed. A lab with an expired accreditation is not accredited.

That's it. Five steps. Thirty seconds. It's the cheapest insurance you'll ever buy.

💡 Note

Pro tip: Screenshot or PDF the accreditation verification page. Save it with your lab records. If a retailer asks for proof of lab accreditation six months later and the lab has let their accreditation lapse (it happens), you'll be glad you have documentation from when the testing was actually performed.

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The Real Cost Difference (And Why It's Not What You Think)

Yes, accredited labs charge more. But let's look at the actual math:

The accredited lab is $160-670 more. Now compare that to:

• A rejected Amazon compliance submission: $0 immediate cost, but 2-4 weeks of lost sales while you re-test, possibly a listing suspension if you miss the deadline, and thousands in lost revenue.
• A retailer rejecting your vendor application: $0 immediate cost, but $50,000-$500,000 in shelf placement you'll never get.
• An FDA 483 observation for inadequate lab qualification: legal fees, remediation costs, and a public record that follows you forever.

The accredited premium is the cheapest insurance in the supplement business.

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The One Time You CAN Use a Non-Accredited Lab

Internal R&D. That's it.

When you're screening five different ashwagandha extracts to decide which one to use, and none of the results will ever be shown to a retailer, Amazon, the FDA, or a customer — use whatever lab gives you the fastest turnaround at the lowest price.

The moment the results become part of a compliance submission, a label claim justification, or a public-facing document? Accredited only. No exceptions.

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FAQ

Q: Are all accredited labs equally good?

No. Accreditation says the lab meets a minimum standard of competence. It doesn't say they're fast, responsive, or experienced with your specific product matrix. A lab that's great at environmental water testing might be terrible at gummy supplements. Accreditation is necessary but not sufficient. Ask about their experience with your product type.

Q: What's the difference between ANAB, A2LA, IAS, and Perry Johnson?

They're all ILAC-recognized accreditation bodies, meaning they're internationally accepted as equivalent. ANAB and A2LA are the two largest and most commonly seen in the supplement industry. They all audit labs to the same ISO 17025 standard. Pick any of them — the important thing is that the accreditation exists, not which logo is on the certificate.

Q: My manufacturer uses an in-house lab that's ISO 17025 accredited. Can I use their results?

It depends on what you're using them for. An in-house accredited lab at a manufacturer is still not a "third-party" lab — it's owned by the company that's making and selling you the product. For internal quality purposes, it's fine. For Amazon compliance, they require third-party testing, meaning a lab with no financial interest in the results. Same for most retailers.

Q: Can a lab lose their accreditation?

Yes. Accreditation bodies perform surveillance audits (usually annually) and full re-assessments (every 2 years). If a lab fails an audit, they can be put on probation or lose accreditation entirely. This is rare but it happens. Check the accreditation status before every major submission, not just when you first qualified the lab.

Q: What if there's no accredited lab that tests my specific ingredient?

This happens with novel ingredients. In that case, work with an accredited lab that has the closest relevant scope and ask them to use a scientifically valid method with appropriate validation. Document why no accredited method exists. During a GMP audit, show the investigator your due diligence. You still need to test — you just need to be able to justify your approach.

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The Bottom Line

If your test results are going anywhere near a compliance submission, a retailer, or the public, use an ISO 17025 accredited lab. The price difference is real but the cost of not doing it is existential.

And if a lab won't tell you their accreditation number, can't point you to their scope, or mumbles something about "following ISO guidelines"? Hang up. There are hundreds of genuinely accredited labs in the US. You don't need to gamble on one that can't prove it.

At LabQuotes, every lab in our network is ISO 17025 accredited with verified credentials. No "we follow guidelines" nonsense. No pixelated logos. Just real labs with real accreditations that Amazon, retailers, and the FDA actually accept. Tell us what you need tested and we'll match you with labs that have it on their scope.

Find ISO 17025 Accredited Labs →

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Quick Reference: Finding an Accredited Lab

Lab Category Matching

You need an ISO/IEC 17025:2017 accredited laboratory with a scope that explicitly covers dietary supplements or food chemistry. Accreditation bodies: ANAB (US), A2LA (US), UKAS (UK), DAkkS (Germany), COFRAC (France), NATA (Australia), JAB (Japan). All are ILAC-recognized and internationally accepted.

Internal links: See Find a Testing Lab and Third Party Testing Guide.

How to Verify Accreditation (Step by Step)

1. Ask the lab for their accreditation certificate number (e.g. ANAB AT-1234)
2. Go to the accreditation body's public directory:
   • ANAB: https://search.anab.org
   • A2LA: https://www.a2la.org/dirsearchnew/newsearch.cfm
   • UKAS: https://www.ukas.com/find-an-organisation/
3. Search for the lab by name or certificate number
4. Check that their scope explicitly lists: dietary supplements, nutraceuticals, or food testing
5. Verify the specific methods (USP, AOAC, FCC) are on their scope — a lab accredited for "HPLC testing" isn't enough; they need "USP <621> Chromatography" or the specific method you need

What Sample to Send

Same as any accredited testing submission. Most labs require:

• Quantity: 10-20 finished units or 50-100g of raw material
• Chain of custody form: Your company info, product name, lot number, tests requested
• Shipping: Standard courier. Include a prepaid return label if you want unused samples back.

Expected Turnaround

Accredited labs are generally slightly slower than non-accredited due to additional QA review steps. Expect:

• Standard TAT: 7-14 business days
• Rush options: Available at most labs (+50-75% surcharge, 5-7 day TAT)

Accreditation Comparison

Price Ranges (US Market)

Country/Region Notes

• US: Abundant accredited labs. ANAB and A2LA are the dominant bodies. Most labs are in NJ, CA, UT, FL, WI.
• EU: National bodies (UKAS, DAkkS, COFRAC, etc.) are all ILAC-recognized. Results from any EU national body are accepted across the EU.
• Asia-Pacific: SGS, Eurofins, ALS, Intertek maintain accredited labs in most countries. Check the local ILAC member body for verification.
• Latin America: Fewer options — many Brazilian and Mexican labs hold A2LA or ANAB accreditation directly.

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Get Matched With an Accredited Lab

• Test type: [What do you need tested?]
• Accreditation needed: ☐ ISO 17025 ☐ GMP ☐ FDA Registered ☐ DEA Licensed
• Country: [Where are you / your product?]

Find an Accredited Lab →