The UMF grading system appraise natural markers found in Manuka honey, and assures purity and quality. Please see umf.org.nz. Given by nature, proven by science. Manuka Health are leaders in Manuka honey science. Our dedicated care and expertise ensures pure authentic Manuka honey, connecting you with the power of nature. Every spoonful of our delicious, smooth monofloral Manuka honey is: Certified natural methylglyoxal (MGO), at least 263mg/kg. Tested for quality, purity and NZ origin. Raw, unpasteurized and non-GMO. Protected and traceable from beekeeper to jar.