Manuka honeys are homogeneous honeys that were produced only in New Zealand, during the period of flowering Manuka shrubs, which are mainly made of the nectar of Leptospermum scoparium species.
These honeys should additionally have the following features: appropriate conductivity range, exceptional taste defined as mineral, slightly bitter; strongly aromatic fragrance with noticeable notes of moist earth and heather; the presence of pollen characteristic of Manuka shrubs and active ingredients, including: methylglyoxal (MGO®) (Science and characteristing Manuka honey - Current and future science to support a definition. Ministry for Primary Industries, New Zealand Government. July 2014).
MGO® is an abbreviation of Methylglyoxal - a natural substance recognized by scientists as a characteristic ingredient of Manuka honeys, which, due to its high content, differ from other honeys available on the market. The research on the composition of Manuka honeys and methylglyoxal was conducted by prof. Thomas Henle from the Dresden University of Technology - one of the world's leading food researchers. Conclusions of prof. Henle was supported by New Zealand scientists, including: prof. Molan, an earlier precursor of Manuka honey research. This is how the method of measuring and determining the quality of Manuka honeys - MGO® was created, which is objective and repeatable.