UMF™ is a globally recognized and independently certified quality assurance system that guarantees the potency, authenticity, purity, shelf life, and freshness of New Zealand manuka honey. The UMF™ trademark is the only standard of its kind, ensuring that each jar of UMF manuka honey meets the stringent quality, grading, and rating criteria set by the Unique Manuka Factor Honey Association (UMFHA). This provides consumers with confidence in their purchase of UMF manuka honey. Nature's Nutrition UMF license# 3106.