Manuka Honey: Microbiological Testing

Manuka Honey: Microbiological Testing
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  • Telephone

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Manuka Honey: Microbiological Testing
  • Method Used
    Microbiological Assay
  • Standard Turnaround Time
    15 working days

Total Activity (TA) and Non-Peroxide Activity (NPA) are measures of the ability of a honey to inhibit microbial growth. Phenol equivalence testing through traditional plate bioassay methods is used to accurately assess these levels and allow producers to ensure labelling requirements are met.

Our scientists measure the TA of your honey sample as a true to label test. This takes into account both peroxide and non-peroxide activity (NPA). Honey naturally possesses anti-microbial properties, but Manuka honey uniquely displays additional non-peroxide antimicrobial activity due to the presence of Methylglyoxal (MGO). If requested, we can use a conversion equation to report the NPA level of your sample alongside the measured MGO concentration. The TA activity value on a label next to the word Manuka can be misleading as TA alone is not an indication of Manuka’s unique anti-microbial properties. With the level of anti-microbial activity varying between products, it is vital that producers and retailers can provide robust evidence such as both TA and NPA results to support the labelling claims on the packaging of their products.

Fera offers testing services to confirm antimicrobial activity in Manuka honey, and all analyses are validated for performance to current industry standards.

Submitting your sample

When submitting your sample please include the food sample submission form to allow us to process your samples efficiently. Failure to send a sample submission form may result in a delay of your sample being tested.

Download the food sample submission form here.



Method Used

Microbiological Assay


LOD varies from between batches and is one of the controls checked before issuing reports



Minimum Sample Quantity (Batch Size)


Minimum Sample Weight


Standard Turnaround Time

15 working days

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