Australian Manuka honey has a naturally occurring compound, Methylglyoxal (MGO), that is formed in the honey from Manuka nectar. The amount of MGO in your Manuka honey is directly related to its potency and anti-bacterial properties. The AB’s Manuka Honey you are purchasing on this page has been independently laboratory tested and is rated MGO 500+. It is scientifically tested for MGO (methylglyoxal) that has a content of 500mg+ per kilo. It has high anti-bacterial, powerful antimicrobial, and nutritional properties.