The COA Said It Passed. The Lab Used the Wrong Method.

A certificate of analysis makes two claims: a result, and the method that produced it. Almost every COA review checks the first. On May 26, 2026, Nutricia North America began recalling two tube-feed formulas because the lab testing vitamin A used the wrong method and reported more vitamin A than the product held. The record doesn't say what value the lab reported or what Nutricia's spec required, only that the method was wrong and the product shipped on it.

What the recall record says

The recall covered two Functional Formularies products, and the reason recorded in the FDA enforcement record is a laboratory using the wrong vitamin A method. Nutricia North America, of White Plains, New York, initiated it voluntarily on May 26, 2026, covering LIQUID HOPE Organic Whole Foods Meal Replacement Peptide Formula Berry Medley and NOURISH Organic Whole Foods Meal Replacement Peptide Formula Berry Medley, both in 12 oz pouches.

The stated reason, verbatim: "Subpotent for Vitamin A. The firm discovered that the testing laboratory used the wrong method when testing for Vitamin A. The test results gave a higher concentration of vitamin A than what is actually in the product."

FDA classified both recalls Class II on July 13 and published them July 22. Class II covers a situation in which use of a violative product "may cause temporary or medically reversible adverse health consequences or where the probability of serious adverse health consequences is remote." Both were still listed as Ongoing in the openFDA enforcement data as of its September 2, 2026 update.

The quantities are not small. Liquid Hope: 1,363 cases of 12 pouches plus 16,298 cases of 24. Nourish: 2,050 cases of 12 plus 55,310 cases of 24. Shipped to 48 states and Washington DC, and also to Canada and Australia.

The sentence that matters in that reason is the second one: "The firm discovered." Nutricia found it themselves. Someone inside went looking at how the test was run rather than at what it returned.

The record stops there. It doesn't say whether a COA changed hands, what number was on it, or what Nutricia's vitamin A spec required. What it does say is that a wrong-method result overstated vitamin A and product shipped on that result, which means something accepted the number.

The method line is on the COA and not in the review

A COA review that compares the reported value to the spec limit cannot catch a method error, because the method line is not part of the comparison.

Open any COA. It gives you an analyte, a result, units, a spec range, and a pass or fail. Somewhere on the page, usually in smaller type toward the bottom, it gives you a method reference.

A QA tech reads the result, reads the spec, and stamps it. The method reference sits on the same sheet of paper and never enters the decision.

That method line carries four questions your review never asks:

• Applicability to the matrix. For vitamin A, the applicable method depends on the matrix, the intended use, and the concentration range.

• Validation at the concentration in question. AOAC 992.06 below carries a concentration bound in its own applicability statement.

• Agreement with the spec. The limit was written with some method in mind, and usually nobody recorded which one.

• Coverage by the lab's accreditation, for this analyte and this matrix.

A COA can be accurate to a wrong method and still be wrong about the product. The lab did its job and the chemistry ran to protocol. The number is a faithful report of what that method measures. It just isn't the number your spec is about.

This is the third distinct way a clean COA fails, and the three don't overlap. Two tiers up, the signal starts at a supplier you have no contract with and never appears on any COA you hold. At the sampling level, a negative result is evidence about the sample, not about the lot. Here the sample is right and the lot is right, and the measurement is answering a different question than the one you asked.

The same analyte, different methods, different numbers

Run one sample for one nutrient by two validated methods and you can get two different numbers. Both runs are correct. The gap is the methods.

Vitamin A is a useful illustration because AOAC INTERNATIONAL has several validated methods for it and their scopes are bound to matrix. The paper describing AOAC First Action 2011.15 puts it plainly: "Existing AOAC LC methods are suited for specific vitamin A analytical applications."

AOAC 992.06 is written for milk-based infant formulas containing more than 500 IU of vitamin A per reconstituted quart. Run it as written on specialty formulas and, per the single-laboratory validation published in the Journal of AOAC International, "vitamin A recoveries are low compared to results generated with alternate validated vitamin A methods." The correction was a reagent volume: double the potassium hydroxide in the saponification step.

Same nutrient, same product family, and a sample-prep detail moves the reported number.

The enforcement record doesn't name the method Nutricia's lab used, and there's no reason to guess at it. The direction of error there was high rather than low, so the 992.06 example above is an illustration and not the mechanism. Which method a lab picked matters far less than the fact that the choice moves the number at all.

FDA's own compliance framework for nutrient content builds the method in. 21 CFR 101.9(g)(2) says composites "shall be analyzed by appropriate methods as given in the 'Official Methods of Analysis of the AOAC International,' or, if no AOAC method is available or appropriate, by other reliable and appropriate analytical procedures." Appropriate is doing real work in that sentence.

The tolerance itself is method-aware. For naturally occurring nutrients, the same section says no regulatory action follows a shortfall smaller than "the variability generally recognized for the analytical method used in that food at the level involved." The agency writes the method into the number it will act on. Most supplier specs don't.

What "accredited" actually covers

ISO/IEC 17025 accreditation covers a list of specific methods a lab was assessed on, and nothing outside that list.

A2LA, one of the accreditation bodies, defines a scope of accreditation as "the list of specific tests, types of tests, calibrations, product certifications, etc. for which a Conformity Assessment Body (CAB) is found competent." Then it states the limit directly: "Capabilities that are not listed on the scope are not covered by the CAB's A2LA accreditation."

FDA says the same thing in regulation. Under the Laboratory Accreditation for Analyses of Foods rule, "scope of LAAF-accreditation refers to the methods of analysis for which the laboratory is LAAF-accredited" (21 CFR 1.1102). A lab has to show that "for each method, the laboratory is accredited by a recognized accreditation body to ISO/IEC 17025:2017(E)," and that it has passed a proficiency test within the last 12 months "for each method within the scope of LAAF-accreditation" (21 CFR 1.1138).

Per method. Not per lab.

A current accreditation doesn't make every test an accredited test. Check the scope for the method, the analyte, the matrix, and the range limits. For testing under the LAAF rule, the method used must be "within the laboratory's scope of LAAF-accreditation" (21 CFR 1.1151(a)), and a lab that wants to work outside its scope has to ask FDA in writing under 21 CFR 1.1151(e).

The accreditation logo in the COA header doesn't tell you which side of that line your test landed on. The scope does.

Whose lab it is doesn't change the mechanism

The enforcement record says only "the testing laboratory." It doesn't say in-house or contract, and the blind spot works the same either way.

Owning the lab gives you more access to the method, not more scrutiny of it. The result still arrives as a value on a report, and the person receiving it still compares that value to a limit.

For an accredited lab, obtain the current scope from the lab or its accreditation body. The scope, not the certificate alone, shows whether the method is covered. An internal lab that holds no accreditation has no scope to obtain, which leaves method selection checked only by whoever selected it.

Three columns to add to your COA review

Add three columns to whatever you already track COAs in, and the method stops being invisible.

Method. The method reference printed on the COA, copied into the record next to the result. If the COA doesn't print one, ask for it in writing and make every COA after that carry it.

Lab scope, verified. The date you last obtained the lab's current scope of accreditation and confirmed that the method appears on it for your analyte and your matrix. Get the scope from the lab or its accreditation body, rather than relying on the certificate alone.

Last split sample. The date you last sent a duplicate of the same lot to a second lab and compared the results. Quarterly is a reasonable starting cadence on any analyte that carries a label claim or a spec you release product against.

The first two columns and the first round of scope requests are an afternoon of work. The split sample takes longer because of lab turnaround, but putting it on the calendar doesn't.

One more change costs nothing: put the method in the spec. A specification that reads "Vitamin A: 750 to 1,500 IU per serving" and stops there hands the method choice to whoever happens to run the test that day. A spec line that names the method makes a substitution visible on the COA instead of invisible in the lab.

Beacon reads each COA value against the spec and flags the miss, and a person decides the hold. That value comparison is the part software is good at. The method column is the part you add, because nothing can check a method the spec never named.

Nutricia's formulas shipped to 48 states, Canada and Australia on vitamin A numbers a wrong method produced. Whatever reviewed those numbers wasn't looking at the method.

If your COAs live in a shared drive and your supplier records live somewhere else, adding a method column is a retyping project before it's a program. Book a call and I'll show you what it looks like when the spec, the COA and the lot are one record.