What is UMF™?
UMF™ (Unique Manuka Factor) is the only independent New Zealand certification system for the quality and authenticity of Manuka honey. The licence is granted by the UMF Honey Association (umf.org.nz), and every licensed honey is independently laboratory-tested.
What UMF measures (a 4-factor test)
- MGO (methylglyoxal) – the main active component that determines strength.
- Leptosperin – proves the honey is genuinely Manuka (it cannot be added artificially).
- DHA – indicates the honey’s maturity and shelf life.
- HMF – a freshness indicator.
UMF and MGO equivalents
| UMF | MGO | Purpose |
|---|---|---|
| UMF 5+ | MGO 83+ | Everyday natural sweetener |
| UMF 10+ | MGO 263+ | Light everyday support |
| UMF 13+ | MGO 400+ | Balanced everyday health |
| UMF 16+ | MGO 570+ | High activity |
| UMF 20+ | MGO 829+ | Premium, intensive |
| UMF 22+ | MGO 971+ | Very high activity |
| UMF 25+ | MGO 1200+ | Highest strength |
How to recognise GENUINE Manuka honey
A genuine UMF honey label always shows: the UMF rating (e.g. UMF 10+); the licence holder and licence number; the New Zealand origin; and the MGO value. If any of these are missing, it may not be authentic Manuka honey.
Haddrell’s is officially UMF™ certified — licence No. 1027 (made by Prolife Foods Ltd.). Read more: Why Haddrell’s?