UMF 16, MGO 573, New Zealand Manuka Honey 250gm from Manuka Health. Manuka Honey is collected from a plant that is unique to New Zealand – Leptospermum scoparium. MGO refers to a very special antibacterial property produced naturally by the nectar of some manuka flowers. All Manuka Health Active Manuka Honey products have been tested and certified by independent laboratories. MGO measures methylglyoxal content based on standards developed by University of Dresden. For example, MGO 100 is certified to contain at least 100mg/kg of dietary methylglyoxal, the minimum required for health benefits. Useful for Digestive Care, Wound Care, Winter Wellness, Oral Care, General Well-Being.