ISO 17025 Accreditation and What a Peptide Certificate of Analysis Actually Proves
Educational content only. Not medical advice. FeelGood does not claim that any peptide treats, cures, prevents, or mitigates any disease or condition. Consult a qualified healthcare provider before making any decisions about peptide therapy.
ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. Accreditation to it means an independent accreditation body has assessed a laboratory and recognized its technical competence, validated methods, measurement traceability, and ongoing external audit, within a defined scope. It accredits the laboratory and its methods, not the peptide product or any individual result.[1]
"ISO 17025 accredited" appears on a growing share of peptide product pages, where it functions as a quality signal. The phrase is also routinely misread. ISO/IEC 17025 is an international standard, but it does not accredit products. It accredits laboratories. The distinction governs what a peptide certificate of analysis (COA) can and cannot prove, and it is the difference between a verifiable quality claim and a decorative one.
ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. A laboratory accredited to it has demonstrated, to an independent accreditation body, that it operates a documented quality system, employs competent personnel, uses validated methods, maintains traceable measurements, and reports results with defined uncertainty.[1] The accreditation describes the testing process rather than the sample tested.
This article sets out what ISO/IEC 17025 accreditation certifies, how it differs from certification, how a laboratory's accreditation can be verified in public directories, and why that verification matters for a peptide COA. It deconflicts deliberately from the question of how peptide purity and identity are measured, which the methods article in this collection covers.[8]
What ISO/IEC 17025 accreditation actually certifies
Accreditation to ISO/IEC 17025 certifies four things about a laboratory, assessed by an external accreditation body and re-assessed on a recurring cycle.
The first is technical competence. The standard requires that personnel are trained and qualified for the methods they run, and that the laboratory documents how that competence is established and maintained.[1] Competence is assessed for defined activities rather than asserted in general.
The second is the use of validated methods. An accredited laboratory does not simply run a procedure; it demonstrates that the method produces accurate and reproducible results for the matrix it is applied to, through method validation or verification.[2] For a peptide, that means the chromatographic or spectrometric method has been shown to perform as intended before any result on a COA carries weight.
The third is measurement traceability and calibration. Instruments are calibrated against reference standards that trace, through an unbroken chain, to national or international measurement standards.[1] Traceability is what allows a purity percentage or a mass figure reported by one accredited laboratory to mean the same thing as the same figure reported by another.
The fourth is external audit and ongoing surveillance. Accreditation is granted only after an on-site assessment by an accreditation body and is maintained through periodic reassessment, proficiency testing, and surveillance visits.[2][3] Proficiency testing, in which a laboratory analyzes blind samples and its results are compared against a known value or against peer laboratories, is one of the mechanisms by which continued competence is checked rather than assumed.
Each of these is documented in the laboratory's scope of accreditation, the formal record of exactly which methods and measurements the accreditation covers. A laboratory accredited for high-performance liquid chromatography is accredited for that method. Another method requires its own entry in the scope.
Accreditation versus certification (the common confusion)
The two words are used interchangeably in marketing copy and mean different things in the standards world.
Accreditation is third-party recognition that a body is competent to perform specific conformity-assessment tasks such as testing or calibration. It is granted to a laboratory by an accreditation body and is specific to defined methods.[4] Certification, by contrast, is third-party attestation that a management system conforms to a set of requirements, such as ISO 9001.[4] A company can be certified to ISO 9001 for having a conforming quality-management system without any statement about the technical accuracy of a particular test.
ISO/IEC 17025 incorporates management-system requirements that align with the principles of ISO 9001, but it adds the technical-competence requirements that a pure management-system standard does not contain.[1] This is why the correct phrasing is "ISO 17025 accredited," applied to a laboratory, rather than "ISO 17025 certified," applied to a product. A product page that advertises an "ISO 17025 certified peptide" is using the term in a way the standard does not support. The accurate claim is that a named laboratory holds ISO 17025 accreditation for the methods used to test the material.
How to verify a lab's accreditation
The accreditation claim is one of the few quality signals on a peptide COA that a buyer can confirm independently, because accreditation bodies publish their accredited laboratories.
Accreditation bodies are themselves evaluated, through a peer-review process operating under ISO/IEC 17011 and coordinated internationally by the International Laboratory Accreditation Cooperation (ILAC).[5] ILAC maintains a Mutual Recognition Arrangement under which accreditation bodies that have been peer-evaluated as competent sign on, so that test and calibration results carrying an accredited body's recognition are accepted across borders.[5] In the United States, the two largest accreditation bodies for testing laboratories are the American Association for Laboratory Accreditation (A2LA) and the ANSI National Accreditation Board (ANAB).[3]
Both bodies maintain searchable public directories that list each accredited laboratory, its scope of accreditation, and the current status and expiration of the accreditation.[3] Verification is a short routine. Take the laboratory name from the COA, search the relevant directory, and confirm three things: that the laboratory appears and its accreditation is current, that the scope includes the specific methods listed on the COA, and that the accreditation has not lapsed. National accreditation bodies in other countries, and ILAC's roster of recognition signatories, serve the same function for laboratories accredited outside the United States.[5]
A COA from a laboratory that does not appear in the accreditation body's directory, or whose scope does not cover the methods on the COA, is a claim that has not survived verification. The value of the public directory is precisely that it removes the need to take the claim on trust.
Why it matters for a peptide certificate of analysis
A peptide COA reports results from a small set of analytical tests. The accreditation status of the laboratory that produced those results determines how much evidentiary weight the COA carries.
An accredited laboratory's purity result rests on a validated method, calibrated instruments, and traceable measurement standards, which is what allows the figure to be compared across batches and across laboratories. A result from a laboratory whose competence is undocumented may report the same number with none of that underlying assurance. The figure looks identical on the page; what differs is whether anything stands behind it. How those individual tests work, and what each one does and does not establish, is the subject of the peptide testing methods article in this collection.[8]
Accreditation also has limits that matter for how a COA should be read. ISO/IEC 17025 certifies the testing, not the manufacturing. A peptide synthesized at an unregistered facility can still be tested by an accredited laboratory and yield a valid COA, because the COA documents what the testing found in the sample submitted rather than the conditions under which the material was made. Manufacturing is a separate question, verifiable through a facility's registration record rather than through the testing laboratory's accreditation.[6] Accreditation likewise says nothing about chain of custody, the documented link between the batch a customer receives and the sample the laboratory analyzed. A complete quality picture therefore reads the COA alongside the manufacturing-documentation and batch-tracing checks set out in FeelGood's certificate-of-analysis guide.[7]
The practical consequence is narrow and useful. ISO/IEC 17025 accreditation, confirmed in a public directory and matched to the methods on a batch-specific COA, tells a reader that the testing meets a recognized competence standard. It does not, by itself, certify the product. It certifies the laboratory that tested it, which is a real and verifiable thing, and the starting point rather than the entirety of product due diligence.
Frequently asked questions
What is ISO/IEC 17025?
ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. Its full title is "General requirements for the competence of testing and calibration laboratories," and the current edition is ISO/IEC 17025:2017. It sets requirements for technical competence, validated methods, measurement traceability, impartiality, and a documented quality-management system.[1]
What does ISO 17025 accreditation mean?
It means an independent accreditation body has assessed a laboratory and recognized it as competent to perform specific testing or calibration methods. The recognition applies to the methods listed in the laboratory's scope of accreditation and is maintained through periodic reassessment and proficiency testing rather than granted once and left unchecked.[2][4]
How can a lab's accreditation be verified?
Accreditation bodies publish searchable directories of accredited laboratories. A reader can take the laboratory name from a COA, search the directory of the relevant body (in the United States, A2LA or ANAB), and confirm that the laboratory is currently accredited and that its scope covers the methods on the COA.[3] ILAC maintains the international framework that connects national accreditation bodies.[5]
Is ISO 17025 the same as ISO 9001?
No. ISO 9001 is a management-system standard, and conformity to it is confirmed through certification. ISO/IEC 17025 adds technical-competence requirements specific to laboratories and is confirmed through accreditation. ISO/IEC 17025 aligns with the management-system principles of ISO 9001 but goes beyond them.[1][4]
What is a scope of accreditation?
A scope of accreditation is the formal record of the specific methods, tests, and measurements a laboratory's accreditation covers. Accreditation is never general; a laboratory accredited for one analytical method is not thereby accredited for another, and the scope is the document that states which methods qualify.[3]
Does ISO 17025 certify a peptide product?
No. The accreditation applies to the laboratory and its testing methods, not to any product. A COA from an accredited laboratory documents what the testing found in a submitted sample. Product-level assurance also requires manufacturing documentation and batch traceability, which the accreditation does not address.[1][7]
FeelGood supplies research-use-only peptides sourced in the United States and Europe. Each batch is released with a third-party certificate of analysis documenting identity by mass spectrometry, purity by high-performance liquid chromatography, and ISO 17025 accredited testing.
Footnotes
[1] International Organization for Standardization, ISO/IEC 17025:2017, General requirements for the competence of testing and calibration laboratories. https://www.iso.org/standard/66912.html. Overview at https://www.iso.org/ISO-IEC-17025-testing-and-calibration-laboratories.html
[2] ANSI National Accreditation Board (ANAB), "ISO/IEC 17025." https://anab.ansi.org/standard/iso-iec-17025/. ANAB describes the assessment, method-validation, and surveillance basis of accreditation.
[3] A2LA accredited-laboratory directory, https://www.a2la.org/directory-search. ANAB accredited-laboratory directory, https://search.anab.org/. Both list each laboratory's scope of accreditation and current status.
[4] A2LA, "10 Steps Toward Achieving ISO/IEC 17025 Accreditation." https://a2la.org/10-steps-toward-achieving-iso-iec-17025-accreditation/. Distinguishes accreditation of a conformity-assessment body from management-system certification such as ISO 9001.
[5] International Laboratory Accreditation Cooperation (ILAC). https://ilac.org/. ILAC coordinates the peer-review process (under ISO/IEC 17011) and the Mutual Recognition Arrangement through which accreditation bodies are recognized internationally.
[6] FDA Drug Establishments Current Registration Site (DECRS). https://www.accessdata.fda.gov/scripts/cder/drls/default.cfm. Used to confirm a manufacturing facility's drug-establishment registration, separately from any testing-laboratory accreditation.
[7] FeelGood. "How to Read a Certificate of Analysis for a Peptide Supplement." https://feelgoodpeptide.com/blog/how-to-read-a-certificate-of-analysis-for-a-peptide-supplement
[8] FeelGood. "How Peptides Are Tested for Purity and Identity." https://feelgoodpeptide.com/blog/how-peptides-are-tested-for-purity-and-identity