Expiry NOV 2022. Organicer Manuka Honey UMF 20+ 500g. Manuka is an evergreen tree native to New Zealand. Manuka honey contains an extraordinary, naturally present chemical marker called Methylglyoxal. UMF?? stands for Unique Manuka Facto. The UMF grading system appraises natural markers found in Manuka Honey and assures purity and quality. Please see: www.UMF.org.nz. The UMF designation and rating is a highly sought after and well-respected quality trademark that producers are proud to display on their label. The UMF quality trademark ranges from UMF 5+ upwards depending on the UMF activity rating. This MANUKA honey is guaranteed to be at least UMF10+ and has been verified by an independent testing laboratory.