UMF™ means Unique Mānuka Factor. Our UMF™ Mānuka Honey has been tested and certified in an independent lab to ensure the honey’s purity, quality and mānuka content, which is reflected in its UMF™ rating, such as UMF™ 10+.Every batch of our UMF™ Mānuka Honey has been tested and certified in an independent lab. UMF™ quality assurance independently certifies four factors in mānuka honey and summarises them in a single figure.The higher the UMF™ number, the higher the presence of mānuka honey’s unique signature compounds. Mother Earth's UMF™ Honey Association's licence number is 1027.Guaranteed authentic mānuka honey from New Zealand