When you see “UMF 15+ verified” on a review here, it means a jar was bought at retail and its label, batch documentation, UMFHA license information, sensory characteristics, and value were all checked. This process verifies a product’s documented claims and traceability, it does not replace independent laboratory testing of the individual jar purchased, and “tested” on this site refers to this full review method, not a lab analysis run on each jar. Here’s exactly what each step involves and what it actually looks like to run.
What “Tested” Is Meant to Mean Here
“Tested” is meant to mean five specific things happened before a review score gets published: the jar was bought at retail, the label was checked against its batch documentation, a UMF license was cross-checked against UMFHA’s public listing when applicable, the honey was reviewed directly for sensory characteristics, and its price was compared against its documented grade. No step gets skipped, and no product receives a review score until these documented checks are complete. Here’s more on Ella’s background and why every jar gets run through this before a word gets written about it.
Step 1: Buy the Jar at Retail
Every jar reviewed here should be one bought directly, at the same store or site a reader would buy it from. No brand ships a jar for review, and no brand gets a preview of what will be said about it.
Keeping the receipt for every jar tested is part of the method. For example, a UMF 15+ jar bought from a regular online retailer, the same listing a reader would click on, with the dated receipt kept as the record tying that specific review to a real, traceable purchase rather than a sample picked out by the brand.
This is also where the “no gifted samples” rule starts. More on why that matters later, but it’s the reason this step always looks the same: buy it like a customer, not like someone being sent free product.
Step 2: Label Check & Batch Certificate
Before tasting anything, the label gets checked against what’s actually documented for that specific batch. A label can claim a lot. A batch certificate is what’s supposed to back the claim up.
What to Look For on the Label
At a high level, this means checking:
- The UMF or MGO number, and whether it’s stated clearly, not buried
- A UMFHA license number printed on the jar
- A batch or lot number that can be matched to a certificate
- Country of origin and packer details
This is the short version. For the full, line-by-line breakdown of what separates a legitimate label from a misleading one, see our full label-verification checklist.
Reading the Batch Certificate
A batch certificate, sometimes called a certificate of analysis, is documentation associated with a specific production lot, not the brand as a whole. The lot or batch identifier on the jar gets compared with the identifier on the certificate, and the listed test date and reported marker values, such as MGO, DHA, HMF, and leptosperin, get recorded. UMF itself is a licensed certification and rating system rather than a single lab reading, so a certificate shows the underlying markers, not a “UMF reading” as such.
A matching certificate is useful traceability evidence, but it isn’t the same as independent laboratory analysis of the specific retail jar in hand. If a certificate is unavailable, has no matching identifier, or is incomplete, that limitation gets disclosed rather than described as verified potency. This page doesn’t walk through certificates field by field. Here’s how to read a batch certificate line by line for that level of detail.
Step 3: UMFHA License Cross-Check
For products carrying the UMF mark, the four-digit license number printed on the jar gets searched in UMFHA’s own public certification directory at umf.org.nz to check whether it corresponds to the stated brand or license holder. This step checks whether the license number is valid and associated with the named brand, it does not independently verify the contents or potency of the specific jar in hand, that’s a separate question the batch certificate and, ultimately, independent lab analysis would need to answer.
UMFHA license numbers follow a confirmed four-digit format. Comvita, for example, is publicly listed under license #1019 on UMFHA’s own certified brands page, a real, checkable example rather than a hypothetical one. This confirms the public license listing, it doesn’t test the jar itself. A screenshot of the actual search result is part of the method for every jar, so the check isn’t just something claimed to have happened, it’s something that can be shown.
One thing worth flagging clearly: KFactor is a separate, proprietary classification system, not a UMF or MGO rating, and shouldn’t be converted directly into one. KFactor is Wedderspoon’s own system, focused on botanical-source and quality criteria including Manuka pollen content, rather than methylglyoxal or leptosperin specifically. A product carrying only a KFactor claim doesn’t have a UMF license to verify through this search, though a brand could in principle hold a UMF license on some products while using KFactor on others, so it’s worth checking what’s actually printed on the specific jar rather than assuming one system or the other applies.
Step 4: Sensory Review
Documentation confirms licensing and traceability. It doesn’t describe what the honey is actually like to eat, and that’s where a direct sensory review matters.
This step records texture, color, aroma, and flavor after opening the jar, whether it’s smooth or crystallized, mild or robust, easy or difficult to scoop. These observations help a reader understand the eating experience, thick, often a little grainy from natural crystallization, sometimes carrying a savory, earthy edge at higher UMF levels. Sensory review is subjective, though, and it can’t verify UMF grade, MGO content, botanical origin, freshness, storage history, or heat exposure. An elevated HMF result can be relevant to freshness or heat exposure under the applicable standard, but that’s a laboratory measurement, a sensory impression alone can prompt a question worth asking, it can’t establish heat damage or predict an HMF reading on its own.
Step 5: Value Calculation
Once a jar’s documentation has been checked, the last question is simple: how does its price compare against what’s actually documented? This step uses two separate calculations, not one blended number, since UMF is a rating and grams of honey aren’t the same thing as a potency measurement.
Price per gram of honey. Jar price divided by net weight. As a worked example, illustrative rather than a specific real transaction: a $57, 250g jar works out to $57 ÷ 250g = $0.23 per gram of honey. Compare this figure only among products with comparable verified grade and documentation, it’s a cost-of-honey number, not a cost-of-potency number.
Price per milligram of MGO, used only when a product has a documented MGO concentration. Total MGO in the jar is net weight in grams times the MGO concentration in mg/kg, divided by 1000. For a 250g jar labeled MGO 514+ at $57: total MGO = (250 × 514) ÷ 1000 = 128.5mg, so price per mg of MGO = $57 ÷ 128.5mg, or about $0.44 per mg. This is a value comparison based on labeled or documented MGO concentration specifically, not a full measure of health benefit, authenticity, taste, or overall quality.
Why Gifted Samples Are Never Accepted
A jar a brand sends for free comes with an incentive built in, even if nobody says it out loud. Buying every jar at retail, the same way a reader would, reduces one real source of potential bias. It doesn’t substitute for full disclosure, though: no free product is accepted for review, every reviewed jar is purchased through normal retail channels, and if an article contains affiliate links, advertising, sponsorship, consulting, brand relationships, or other financial interests, those are disclosed clearly. Retail purchase reduces one potential conflict of interest, it isn’t a replacement for saying so directly.
How This Site’s Process Is Documented
Grading systems like UMF, MGO, and KFactor are often explained in the abstract elsewhere, leaving a reader to weigh a site’s numbers without much to go on. This page exists so that doesn’t have to be the case here. Every review on this site is meant to trace back to a real, named tester, a retained receipt, and a screenshot-documented UMFHA check where applicable, alongside the disclosures above. See this method applied across every brand reviewed, which is the actual proof this is a working process, not just a policy on paper.
FAQ
Does every Manuka jar go through the exact same check?
Mostly, but with one real exception worth naming honestly. A UMFHA license cross-check in Step 3 only applies to products carrying a UMF license claim, a KFactor-only product like Wedderspoon’s doesn’t give a UMF claim to verify through that search, since KFactor is a separate, proprietary system. If a product carries both a KFactor claim and a UMF mark, the UMF claim gets verified separately. Every other step still applies regardless.
What happens if a brand fails verification?
If a UMFHA license doesn’t check out, or a batch certificate doesn’t match what’s on the label, that jar shouldn’t get a positive rating, and exactly where the verification broke down should be named specifically rather than given a vague pass or fail. A brand doesn’t get quietly dropped from consideration, the specific gap gets stated.
Can I run this method myself on a jar I already own?
Yes. Steps 2 and 3, checking the label against the batch certificate and cross-checking the UMFHA license number, are both things a reader can do directly with the jar in hand, using the same label-verification checklist and batch certificate walkthrough linked earlier on this page.