MGO independently tested* *MGO independently tested at NATA accredited laboratories MGO 900 means MGO+ mg/kg (at bottling) Our unique 100% Australian Manuka Honey is not only bioactive and potent, it's delicious too. The methylglyoxal (MGO) bioactivity level of this particular jar of Manuka is shown below. Bioactivity (MGO) level: MGO (methylglyoxal) - 900, Strength - 5