What Is UMF in Mānuka Honey? A Guide to the Unique Mānuka Factor

Mānuka honey is known worldwide for its distinctive properties and potential health benefits. However, not all Mānuka honey is the same. One of the most important indicators of its quality and authenticity is the UMF rating, short for Unique Mānuka Factor. But what exactly does UMF mean, and why should it matter to consumers?

In this article, we explain the UMF rating system in detail, how it compares to other grading systems, what to look for when purchasing Mānuka honey, and why certified UMF honey is trusted by consumers and healthcare professionals alike.

What Does UMF Mean in Mānuka Honey?

UMF stands for Unique Mānuka Factor, a registered and regulated quality trademark used to identify genuine Mānuka honey produced in New Zealand. The rating measures the concentration of specific key compounds that give Mānuka honey its unique antibacterial properties.

The UMF rating is managed by the UMF Honey Association (UMFHA) in New Zealand, which sets the strict criteria that honey must meet to carry the UMF mark.

What Does the UMF Rating Measure?

Unlike regular honey, Mānuka honey contains naturally occurring compounds that are responsible for its non-peroxide antibacterial activity. The three primary compounds that determine the UMF rating are:

1. Leptosperin – A marker compound found only in Mānuka nectar. It confirms the honey’s botanical origin.

2. Methylglyoxal (MGO) – The primary compound responsible for Mānuka honey's antibacterial activity.

3. Dihydroxyacetone (DHA) – Found in the nectar of the Mānuka flower and converts into MGO during storage.
   

The UMF rating reflects the levels of all three, not just MGO, making it a more complete measure of authenticity and potency.

Common UMF Ratings and What They Mean

The UMF rating is usually displayed as a number (e.g. UMF 5+, UMF 10+, UMF 15+, UMF 20+), indicating the concentration of these key compounds. Here's a breakdown:

The higher the UMF rating, the greater the concentration of key compounds, and typically, the higher the price.

How Is UMF Tested and Certified?

UMF-certified Mānuka honey must be:

• Produced in New Zealand from the nectar of the Mānuka (Leptospermum scoparium) bush

• Independently tested by accredited laboratories

• Licensed by the UMF Honey Association

Every batch is tested for the levels of MGO, DHA, and Leptosperin. The final product is also assessed for general quality parameters such as moisture content, HMF (hydroxymethylfurfural), and authenticity markers.

Honey that meets these standards can display the UMF quality mark and rating on its label. Each jar should also include a lot number and/or QR code that allows consumers to trace the product back to test results.

UMF vs MGO: What’s the Difference?

Several grading systems exist for Mānuka honey, but the most relevant and widely accepted are UMF and MGO.

UMF

• Measures three core markers: MGO, DHA, and Leptosperin

• Backed by a comprehensive testing and licensing process

• Recognised internationally as a quality certification

MGO (Methylglyoxal)

• Indicates only the level of MGO

• Does not verify botanical origin or other important markers

• Easier to understand numerically (e.g. MGO 400+), but less complete

In short, UMF is the most robust and trusted grading system, particularly when it comes to ensuring quality and efficacy.

Why the UMF Rating Matters

There is growing interest in Mānuka honey as a natural remedy for a range of conditions including sore throats, wounds, and skin irritations. However, to obtain these benefits, the honey must contain sufficient levels of MGO and related compounds.

Buying UMF-certified Mānuka honey ensures:

• Proven antibacterial strength

• Product authenticity

• Traceability and transparency

• Compliance with New Zealand government export standards
  
  

It also protects consumers from low-grade or counterfeit products, which unfortunately still exist in the global marketplace.

UMF Certification and Medical Use

While Mānuka honey is available as a food product, certain high-grade Mānuka honeys are used in medical settings, particularly for wound care. These are often sterilised and classified as medical-grade Mānuka honey, used under clinical supervision.

Medical uses include:

• Promoting healing in minor wounds and burns

• Reducing infection in ulcers or surgical wounds

• Managing chronic skin conditions
  
  

For these purposes, UMF 15+ or higher is generally recommended, and should be used in consultation with a healthcare professional.

How to Identify Authentic UMF Mānuka Honey

When shopping for genuine Mānuka honey, look for the following:

• UMF trademark and rating on the front of the label (e.g. UMF 10+, UMF 15+)

• UMF license number issued by the UMF Honey Association

• Clear testing and origin information, often accessible via QR code or batch number

• Made in New Zealand indication

• Trusted brand with transparent labelling and traceability
  
  

Avoid products that only mention "Active Mānuka Honey" or "Bio Active" without proper certification or testing data.

Is Higher UMF Always Better?

Not necessarily. The right UMF level depends on your intended use:

• Everyday wellness: UMF 5+ or 10+

• Immune support and gut health: UMF 10+ to 15+

• Targeted therapeutic use (skin care, wounds, sore throats): UMF 15+ and above
  
  

Higher UMF ratings often cost more due to limited supply and greater potency. If you're taking Mānuka honey regularly as part of your daily routine, UMF 10+ may be sufficient.

Final Thoughts

The UMF rating system is the gold standard for identifying authentic, high-quality Mānuka honey. By measuring the key compounds that define Mānuka honey's unique properties, it provides consumers with reliable information and protection against mislabelled or inferior products.

When choosing Mānuka honey, always check the UMF mark and rating, and ensure you're buying from a reputable source. Whether you’re seeking natural support for your immune system, gut health, or skin, understanding UMF gives you the confidence to make an informed and effective choice.

Why Choose Melora for UMF-Certified Mānuka Honey

At Melora, we are committed to offering only authentic, high-quality UMF-certified Mānuka honey sourced directly from New Zealand. Every jar is independently tested and traceable, ensuring it meets the strict standards set by the UMF Honey Association. With our deep roots in sustainable sourcing and scientific research, we bring you Mānuka honey that is both effective and ethically produced. Whether you're using it for daily wellbeing or targeted support, you can trust that Melora’s Mānuka honey delivers genuine strength, certified quality, and true New Zealand origin, every time.