Differences Between MGO and UMF

If you've ever shopped for Manuka honey, you've likely come across two grading systems: MGO and UMF. Both appear on labels, both relate to quality, and both can be confusing if you're not sure what they measure or how they differ.

Understanding the differences between MGO and UMF is one of the most important steps in choosing the right Manuka honey for your needs. In this guide, we'll explain what each grading system means, how they compare, and what to look for when selecting a genuine, high-quality product.

Methylglyoxal (MGO) is a naturally occurring organic compound found in varying concentrations within Manuka honey. It is the key compound responsible for many of the properties that set Manuka honey apart from regular honey.

MGO forms during the honey's maturation process through the conversion of dihydroxyacetone (DHA), a precursor compound present in the nectar of the Manuka bush (Leptospermum scoparium). As the honey ripens over time, DHA gradually converts into MGO, which is why the age and handling of the honey can influence its final MGO concentration.

In Manuka honey, MGO serves as a direct indicator of antibacterial potency. Studies have shown that MGO exhibits notable antibacterial activity against a wide range of harmful bacteria. This is one of the reasons Manuka honey has traditionally been valued for wound care, immune support, and digestive wellbeing.

The concentration of MGO in Manuka honey can vary significantly, ranging from trace amounts to levels exceeding 1,200 mg/kg in rare, high-potency batches. When you see a number like "MGO 400+" or "MGO 850+" on a jar, it refers to the minimum milligrams of methylglyoxal per kilogram of honey. Higher MGO ratings correspond to increased antibacterial activity. To see how specific MGO ratings translate to UMF ratings, refer to the comparison table below.

Research also suggests that MGO may possess antioxidant properties, helping to neutralise free radicals and support cellular health. This dual role as both an antibacterial agent and an antioxidant further contributes to the value of genuine Manuka honey.

Understanding MGO is an important first step in reading Manuka honey labels with confidence. But MGO is only one part of the picture. The UMF grading system takes a broader view, and understanding how it differs from MGO will help you make a more informed choice.

While MGO focuses on a single compound, the UMF (Unique Manuka Factor) grading system takes a broader approach. UMF evaluates multiple chemical markers to assess the overall quality and authenticity of Manuka honey, not just its antibacterial strength.

The three key markers tested under the UMF system are methylglyoxal (MGO), dihydroxyacetone (DHA), and leptosperin. Leptosperin is particularly important because it serves as a marker of authenticity, confirming that the honey genuinely comes from Manuka nectar. DHA, as discussed above, is the precursor to MGO, and its presence provides an indication of the honey's future potency as it continues to mature.

The UMF rating scale ranges from UMF 5+ at the lower end to UMF 25+ and above for rare, premium-grade honey. Higher UMF ratings indicate a stronger concentration of these combined markers, suggesting greater overall potency.

Because UMF testing covers multiple factors, it is often considered a more comprehensive measure of Manuka honey quality than MGO alone. Research suggests that the combination of methylglyoxal, DHA, and leptosperin in UMF-rated honey may support wound healing, immune function, and digestive health.

For consumers who want the most complete picture of what's in their jar, looking at the UMF rating alongside the MGO value offers a well-rounded understanding. Both MGO and UMF ratings are valuable, but they serve slightly different purposes, which we'll explore in the next section.

Both MGO and UMF grading systems are used to indicate Manuka honey quality, but they approach the assessment from different angles. This is arguably the most important distinction between MGO and UMF to understand.

MGO provides a straightforward, single-compound measure. It tells you the concentration of methylglyoxal in the honey, which directly relates to its antibacterial strength. If you're primarily interested in antibacterial potency, the MGO rating gives you a clear and simple answer.

UMF, on the other hand, offers a more holistic evaluation. By testing for MGO, DHA, and leptosperin together, UMF assesses the honey's overall quality, authenticity, and therapeutic potential. Because it accounts for multiple markers, UMF is often viewed as a more complete quality indicator.

In practice, the choice between relying on MGO or UMF ratings often comes down to personal preference and what matters most to you. Some consumers prefer the simplicity of MGO, while others value the broader assurance that a UMF certification provides. Ultimately, both MGO and UMF grading systems offer valuable information for selecting high-quality Manuka honey that meets your individual needs.

In the Manuka honey industry, both MGO and UMF grading systems are widely used to classify and certify product quality. Manufacturers and suppliers rely on these grading standards to provide transparency and assurance to consumers about the authenticity and potency of their honey.

It is worth noting that the UMF grading system is managed by the UMF Honey Association (UMFHA), a New Zealand-based organisation that licenses the use of the UMF trademark. Products carrying the UMF label must meet strict testing and traceability requirements. MGO ratings, while widely used and scientifically grounded, are not governed by a single licensing body in the same way.

Because grading practices can vary between brands, it is important for consumers to purchase Manuka honey from reputable suppliers who provide verified test results. Trusted retailers like Manuka Hut carry products from established brands with certified MGO and UMF ratings, making it easier to shop with confidence. By choosing suppliers who are transparent about their testing and sourcing, you can be sure that the Manuka honey products you purchase have accurate ratings and genuine provenance.

As a general guide: MGO 263+ (UMF 10+) is considered a good starting point for those seeking meaningful antibacterial activity. MGO 514+ (UMF 15+) and above is typically chosen for more targeted wellness support, while MGO 829+ (UMF 20+) and higher represents rare, premium-grade Manuka honey with very high potency.

When selecting Manuka honey, there are a few important considerations beyond MGO and UMF ratings alone.

First, verify the honey's authenticity. Look for labels that clearly state the honey's origin, such as " 100% New Zealand Manuka Honey", and check that the product comes from a reputable brand with independently verified test results. Certified MGO and UMF ratings on the label provide an added layer of confidence that the honey has been properly tested.

Second, consider how the honey has been processed. Raw and minimally processed Manuka honey is more likely to retain its full range of beneficial compounds compared to heavily processed alternatives. Look for products that have not been exposed to excessive heat during production.

Third, think about your own health goals. Whether you're looking for general daily wellness support, digestive comfort, or something with higher potency for more targeted use, understanding the MGO and UMF scale will help you find the right strength for your needs. For more guidance on the specific benefits of Manuka honey, we've put together a detailed guide.

If you're unsure where to start, Manuka Hut offers a wide range of UMF-certified Manuka honey from trusted New Zealand brands, and our team is always happy to help you find the right product for your needs.

Both MGO and UMF grading systems play an important role in helping consumers assess the quality and potency of Manuka honey. MGO provides a clear, single-compound measure of antibacterial activity based on methylglyoxal concentration. UMF offers a broader evaluation by testing for multiple markers, including MGO, DHA, and leptosperin, to give a more complete picture of the honey's quality and authenticity.

Neither system is inherently better than the other. They simply measure different aspects of what makes Manuka honey valuable. Many high-quality products display both MGO and UMF ratings on the label, making it easy to cross-reference and verify the honey's potency using the conversion table above.

It is also worth remembering that MGO and UMF ratings are not the only factors to consider. The honey's origin, processing methods, and your own individual health needs all play a part in choosing the right product. By taking a balanced approach and purchasing from trusted suppliers, you can feel confident that you're selecting genuine, high-quality Manuka honey with verified ratings.

We hope this guide has helped clarify the differences between MGO and UMF. If you have any questions about specific MGO and UMF ratings, or need help choosing the right jar, don't hesitate to get in touch. You can also browse our full range of UMF-certified Manuka honey to find a product that suits your needs.