Our UMF™ 15+ Manuka Honey (MGO 514+) is a high strength honey. Enjoy nature's superfood straight off the spoon to aid your immunity with the manuka's antibacterial properties. The UMF™ rating system independently certifies natural components found in manuka honey to assure potency, purity, authenticity, & freshness. UMF licence number: 3143 All our manuka honey is independently tested and certified by an accredited laboratory.