Honey Adulteration: The Analysis a Buyer Should Actually Ask For

Honey sits near the top of every list of frequently adulterated foods, for a simple reason: it is an expensive sugar solution, and cheap sugar solutions can be made to resemble it. What has changed over the years is not whether adulteration happens but how well it hides. Syrups have been engineered to pass the tests that once caught them, which means the question a buyer asks — "is this honey authentic?" — has to be followed by a second one: "which analysis would actually show me if it were not?"

Two different questions, often confused

A honey analysis usually answers one of two things. Is this lot in good condition? And is this lot what it claims to be? Buyers frequently receive a certificate that answers the first and assume it has answered the second.

Condition is covered by the parameters in Directive 2001/110/EC: sugar content, moisture, water-insoluble content, electrical conductivity, free acid, diastase activity and hydroxymethylfurfural, with diastase and HMF determined after processing and blending. Authenticity is a separate set of methods aimed at detecting foreign sugars and misdeclared origin. A certificate can be clean on condition and silent on authenticity.

What HMF and diastase are for

Hydroxymethylfurfural forms when honey is heated or stored too long; the EU limit for honey placed on the market is 40 mg/kg, with a higher ceiling of 80 mg/kg for honeys of declared tropical origin. Diastase is an enzyme naturally present in honey that degrades under the same conditions, measured on the Schade scale.

Both are useful, and both are markers of handling rather than authenticity. An overheated honey shows high HMF and low diastase. A carefully adulterated honey — syrup added to a fresh, gently handled lot — can show excellent figures on both. Treating them as authenticity tests is the most common error in honey specification, and it is an understandable one, because they are the two numbers on every certificate.

Which tests detect added sugar, and which do not

Isotope ratio analysis looks at the carbon signature of the sugars. Syrups from plants such as cane and corn carry a different signature from nectar honey, and the method detects them reliably. Syrups from plants that share nectar's signature — beet, rice and others — pass through it undetected, which is exactly the gap that engineered syrups were designed to exploit.

More comprehensive approaches exist. Nuclear magnetic resonance profiling compares a sample against a reference database of authentic honeys and flags deviations in the overall sugar and minor-component pattern. Targeted marker analyses look for specific compounds characteristic of particular syrups. No single method sees everything, which is why the useful question to a laboratory is not "is it authentic?" but "which methods did you run, and what can each of them miss?"

Reading a supplier's certificate

Four things decide how much a certificate is worth. Who drew the sample, and whether it represents the lot. Whether the laboratory is independent of the seller. Which methods were run, named specifically. And whether the document covers authenticity or only condition. A certificate with an HMF figure, a moisture figure and a signature is a document; it is not evidence of what the buyer needs to know.

There is also a supply-chain layer above the lot. Honey may enter the EU only from third countries with an approved residue monitoring plan, and the exporting establishment has to appear on the EU's approved list. Those are conditions on the chain rather than on the individual consignment, and they belong in the first conversation rather than the last.

Where we sit

TeraVella works in honey as a sourcing partner — we do not claim to own an apiary or a filling plant. What we do is verify a producer against your brief, define the adulteration and quality parameters to be tested at quotation rather than after a pallet has arrived, collect batch analyses from the source with the methods named, and manage documented shipment in jars, tins or bulk under your own brand. The destination market's conditions for honey — approved-establishment status included — are checked at the start. We hold ISO 9001, ISO 22000 and ISO 27001 and make no organic or other certification claim. Volumes and prices are confirmed at quotation.