Comvita® UMF® 10+ Manuka Honey is produced in New Zealand & contains unique plant phenols. Comvita® UMF® 10+ Active Manuka Honey is guaranteed to be at least UMF® 10+ & has been verified by an independent testing laboratory. New Zealand Manuka has long been valued for its health-maintaining effects & active Manuka Honey is gaining worldwide recognition for its unique properties. Comvita® is the world’s largest manufacturer of premium quality UMF® Manuka Honey. UMF® stands for ‘ Unique Manuka Factor’, a measure of the unique type of antibacterial activity which is naturally present at varying levels in honey made form the nectar of the Manuka bush (Leptospermum scoparium), native to New Zeal&. The mark UMF® is followed by a number that indicates the strength of the UMF® activity in a batch of UMF® Manuka Honey. The higher the UMF® rating, the more potent the product. For example, a jar of UMF® 20+ Manuka Honey has twice the biological activity of UMF® 10+ Active Manuka Honey.