The "Manuka number" of honey is often associated with the grading system used to measure the antibacterial potency and quality of Manuka honey, a type of honey produced primarily in New Zealand and Australia from the nectar of the **Manuka tree** (*Leptospermum scoparium*). Key Points About Manuka Honey Ratings: 1. **Unique Manuka Factor (UMF)**: The **UMF** is one of the most recognized grading systems for Manuka honey. It measures the levels of key natural markers found in Manuka honey that indicate its potency, purity, and quality. The UMF rating is based on three key compounds: - Methylglyoxal (MGO): The primary antibacterial compound. - Leptosperin:...