The UMF grading system has two components which are expressed on any UMF licenced honey product:
The label claim that it is Manuka
The number – this represents three chemical markers that indicate the content of this honey to ensure purity and quality. This includes the key chemical markers DHA and MGO.
To receive a UMF® grading, a honey must have the presence of DHA (dihydroxyacetone), Methylglyoxal, and Leptosperin. The UMF® rating is a measure of the attributes and values that make up Manuka honey, and assures purity & quality.