What Does 50 MGO Mean in Honey? Your Complete Guide

January 7, 2026 •

3 min read

Manuka honey contains up to 100 times more methylglyoxal (MGO) than regular honey. This MGO rating indicates the concentration of the compound, with 50 MGO representing a mild potency suitable for general wellness and daily consumption. It signifies that there are at least 50 milligrams of methylglyoxal for every kilogram of honey.

Quick Summary

The 50 MGO rating on honey indicates its methylglyoxal concentration, a compound linked to its antibacterial strength. This grading helps consumers understand the honey's potency, with 50 MGO being an entry-level grade ideal for everyday use rather than targeted therapeutic applications.

Key Points

MGO Stands for Methylglyoxal: A naturally occurring compound primarily responsible for Manuka honey's potent and stable antibacterial activity.
50 MGO is an Entry-Level Grade: This rating indicates at least 50mg of methylglyoxal per kilogram of honey, signifying a mild potency suitable for daily, general wellness use.
Not for Intensive Therapeutic Use: Due to its lower concentration, 50 MGO honey is better for everyday consumption rather than treating specific, more severe health conditions.
MGO is Different from UMF: The MGO rating is a direct measure of methylglyoxal, while UMF is a broader certification that also verifies other unique markers for authenticity.
Authenticity is Key: For genuine Manuka honey, look for transparent labeling that includes the MGO or UMF rating, batch codes, and proof of independent testing.
Taste Profile is Milder: Lower MGO honey tends to have a more palatable, less intense flavour profile compared to higher-rated, more potent varieties.

What is MGO (Methylglyoxal)?

MGO, or methylglyoxal, is a naturally occurring compound found in high concentrations in authentic Manuka honey, primarily sourced from New Zealand and parts of Australia. Unlike the hydrogen peroxide responsible for the antibacterial properties in most other types of honey, MGO provides a potent and stable antibacterial effect that is not easily degraded. The compound originates from dihydroxyacetone (DHA), found in Manuka tea tree nectar, which converts to MGO as the honey matures. This conversion is why MGO is a key indicator of the honey's quality and potency.

How does the MGO rating system work?

The MGO rating system quantifies the concentration of methylglyoxal in milligrams per kilogram (mg/kg). A label of MGO 50+ means the honey contains at least 50mg of MGO per kilogram. Higher numbers indicate greater potency.

What a 50 MGO rating means for consumers

A 50 MGO rating signifies a lower-potency, often multifloral honey, suitable for daily use. It's great for adding to food and drinks, offers general wellness benefits like antibacterial properties and antioxidants, is typically more affordable, and has a milder flavor than higher MGO grades.

MGO vs. UMF: Understanding the difference

Manuka honey uses both MGO and UMF ratings to indicate potency, but they differ. MGO measures only methylglyoxal concentration, while UMF (Unique Manuka Factor) is a broader certification measuring four key markers (MGO, Leptosperin, DHA, and HMF) for authenticity, purity, and freshness. UMF is considered a comprehensive quality standard.


Feature	MGO (Methylglyoxal)	UMF (Unique Manuka Factor)
Measurement	Specifically measures the concentration of methylglyoxal (mg/kg).	Measures four key markers: MGO, Leptosperin, DHA, and HMF.
Scope	Focuses on a single, primary antibacterial compound.	Provides a more comprehensive quality assessment, ensuring authenticity, purity, and freshness.
Oversight	The rating is based on lab tests for MGO content.	A licensed quality mark from the UMF Honey Association, which audits producers.
Reliability	A clear and simple indicator of potency.	A broader guarantee of authenticity and origin, considered the "gold standard" by many.
Labeling	MGO 50+	UMF 5+, UMF 10+ (typically correlates with higher MGO).

How to choose the right MGO honey for your needs

Choose your MGO level based on your needs:

Daily use/general health: MGO 50+ to 250+ is suitable.
Targeted wellness: Mid-range MGO 300+ to 800+ is better.
Intensive/therapeutic use (like wound care): High MGO 800+ and above is recommended, often with medical consultation.

List of Manuka honey benefits

Manuka honey offers several benefits:

Antibacterial: Effective against various bacteria, including some resistant strains.
Wound healing: Promotes healing by providing a protective environment and reducing inflammation.
Sore throat relief: Coats the throat and fights infection-causing bacteria.
Digestive support: Helps balance gut bacteria and may aid with conditions like SIBO and ulcers.
Skin health: Can help treat acne and other skin issues when applied topically.

Conclusion

To summarize, what does 50 MGO mean in honey? It signifies an entry-level concentration of methylglyoxal, making it a good choice for general wellness and daily consumption. While not for intensive therapeutic use, 50 MGO honey provides the unique flavor and benefits of Manuka honey. Understanding the distinction between MGO (direct potency measure) and UMF (broader quality assurance) is important. For everyday enjoyment, 50 MGO is an accessible and beneficial option.

Additional resources

The 9 Scientifically Tested Benefits of Manuka Honey

Frequently Asked Questions

MGO stands for methylglyoxal, a naturally occurring organic compound found in Manuka honey. It is the primary chemical marker responsible for the honey's potent antibacterial properties.

Yes, 50 MGO Manuka honey is good for you. It contains beneficial antibacterial and antioxidant properties, making it an excellent choice for daily consumption and general wellness. However, it is a milder grade compared to higher-ated options.

MGO specifically measures the concentration of methylglyoxal in the honey. UMF (Unique Manuka Factor) is a more comprehensive quality certification that includes MGO, along with other markers like DHA and Leptosperin, to ensure authenticity, purity, and potency.

MGO levels are measured by an accredited laboratory using a technique called High-Performance Liquid Chromatography (HPLC). The result is expressed as the concentration of methylglyoxal in milligrams per kilogram (mg/kg).

While 50 MGO honey has antibacterial properties, higher MGO ratings (typically 800+ and above) are recommended for therapeutic purposes like wound care due to their greater potency. You should consult a medical professional for serious conditions.

Higher MGO levels indicate stronger antibacterial potency, which is often associated with higher quality and more specific health benefits. However, the 'best' quality depends on your intended use, with lower MGO being excellent for everyday wellness.

To preserve the honey's potency, store it in a cool, dark place away from direct sunlight. High temperatures or refrigeration can affect its beneficial properties. Always ensure the lid is tightly sealed.