UMF Rating Decoder: Which Grade for Which Use Case (5+ vs 10+ vs 15+ vs 20+)

UMF Grade → Use Case Lookup Table

The fastest answer to "which UMF should I buy?" Pick your goal, find the right grade.

If you want it for...	Right UMF grade	MGO equivalent (mg/kg)	Approx daily cost (per tsp)	Why this grade
Cooking, sweetening, kitchen use	UMF 5+	83+	$0.30–$0.50	Genuine Mānuka flavour without paying for therapeutic-level MGO you won't use.
Daily morning wellness teaspoon	UMF 10+	263+	$0.60–$0.90	Noticeably higher potency, accessible enough for daily routine. Entry to therapeutic range.
Therapeutic use (gut, immune, skin, throat)	UMF 15+ (recommended)	514+	$1.00–$1.50	The sweet spot. MGO clears the 400–500 mg/kg threshold most research identifies. Full flavour, sensible price-per-use.
Acute support (cold/flu, wound care, topical)	UMF 20+	829+	$2.00–$3.00	Reserved for short-term, targeted use during illness. Too expensive for daily.
Clinical / pharmaceutical-grade use	UMF 25+	1,200+	$4.00+	Rare. Only necessary for specific clinical protocols. Most people never need this grade.

UMF ↔ MGO Conversion Table

The two systems measure related but different things. Use this table to translate between them when comparing jars.

UMF grade	Minimum MGO (mg/kg)	Independent leptosperin test included?	Authenticity guarantee?
UMF 5+	83	Yes	Verified by UMFHA
UMF 10+	263	Yes	Verified by UMFHA
UMF 15+	514	Yes	Verified by UMFHA
UMF 20+	829	Yes	Verified by UMFHA
UMF 25+	1,200+	Yes	Verified by UMFHA
MGO-only label (no UMF)	Self-declared	No	None — producer's word only

The 60-Second Buying Decision

1. If a jar has no UMF mark at all, the number on it is a marketing number, not a verified one. Skip.
2. If the price feels low for the UMF claimed, double-check the UMFHA licence number on the jar against the UMFHA website. Counterfeit labels exist.
3. If you're choosing between UMF 10+ and UMF 15+, the MGO content roughly doubles. For therapeutic intent, that's a meaningful gap. Go 15+.
4. If you're choosing between UMF 15+ and UMF 20+, ask whether you'll actually use it daily. UMF 20+ is best reserved for cold/flu season and acute use.

See the full Mānuka FAQ →

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What UMF Actually Measures (Background)

The UMF score is a panel of four markers, not a single chemical. Each marker tells you something different about the honey in front of you.

Marker	What it indicates	Why it matters
Leptosperin	Authenticity marker, only found in genuine Leptospermum scoparium nectar.	Cannot be faked. If it's there, the honey is real Mānuka.
DHA (dihydroxyacetone)	The precursor that converts to MGO over time.	Higher DHA in fresh honey signals the jar will gain potency, not lose it, on the shelf.
MGO (methylglyoxal)	The primary active compound.	The number most research focuses on. Directly correlates with antibacterial activity.
HMF (hydroxymethylfurfural)	Freshness indicator. Must stay below a maximum threshold.	If HMF is high, the honey has been overheated or aged past usefulness.

Where UMF Comes From

UMF stands for Unique Mānuka Factor. It's a grading standard owned and administered by the UMF Honey Association (UMFHA), an independent New Zealand body that licenses producers, audits batches, and sets minimum compound thresholds.

The system exists because Mānuka honey became a global product long before most international buyers had a way to verify what they were actually buying. Fraud was rampant. UMF was the industry's answer: a trademarked, third-party-verified framework that ties every number on the label to a lab result.

If a jar doesn't carry the UMFHA trademark, the number printed on it is not a UMF rating. It may look like one. It isn't.

Why UMF 15+ Is the Daily-Use Sweet Spot

UMF 5+ and 10+ honeys are real, genuine Mānuka honey, but their MGO levels are modest enough that you may find yourself using significant quantities to get consistent results. UMF 20+ and 25+ are potent and worth having on hand, but at those price points most people use them sparingly, which defeats the purpose of a daily wellness routine.

UMF 15+ sits in a sensible middle ground. The MGO concentration is substantial (above 500 mg/kg), the leptosperin is clearly verified, and the flavour is unmistakably Mānuka: earthy, slightly medicinal, nothing like supermarket wildflower. It's a jar you'll actually use every morning without flinching at the cost per spoonful.

"I'd bought cheaper jars for years and wondered what the fuss was. Then I tried a proper UMF 15+ and I actually tasted the difference. It's thicker, darker, and it has this almost herbal edge. I put a teaspoon in warm water every morning now."

Rebecca M., Auckland

Peer-reviewed research suggests MGO concentrations above 400–500 mg/kg are where Mānuka honey's most studied properties become more pronounced. UMF 15+ sits comfortably above that threshold. UMF 10+ sits just below it.

UMF vs. MGO: Why You'll See Both on Shelves

MGO is a simpler label. It just states the methylglyoxal concentration in milligrams per kilogram. Some brands use it because the UMFHA licensing fee and audit process are not cheap, and smaller producers sometimes opt out of the full certification in favour of their own MGO testing.

The problem: MGO alone doesn't confirm authenticity. Without the leptosperin and HMF checks that UMF requires, a high MGO number tells you about one compound in the jar, not whether the honey is genuinely Mānuka or genuinely fresh.

If you're choosing between a UMF-certified jar and an MGO-only jar at a similar price, the UMF jar carries more verification behind it. For a deeper comparison, see UMF vs MGO: What's the Difference.

East Cape Mānuka and Why Origin Matters

Not all Mānuka honey comes from the same part of New Zealand, and geography matters more than most labels acknowledge. Mānuka from the East Cape region (the northeastern tip of the North Island) is consistently found to have higher concentrations of the key compounds that make Mānuka distinctive.

This is the same principle that applies to Mānuka oil: East Cape Leptospermum scoparium trees produce significantly elevated levels of the β-triketone compounds. The same regional variance shows up in the honey. East Cape Mānuka tends to score higher in leptosperin and MGO relative to South Island or generic North Island sources.

Māori have used Leptospermum scoparium in Rongōā (traditional healing practice) for centuries. The bark, leaves, and products of this plant have a long history of use in New Zealand long before any grading system existed.

"I've had my 2018 jar from you sitting in the pantry. It's still good. The flavour hasn't gone anywhere. That's when I knew this wasn't just fancy supermarket honey."

Craig T., Wellington

How to Read a UMF Label Properly

Before you buy, here's what to look for on the jar:

• The UMFHA trademark. A small logo with a licence number. You can verify that number on the UMFHA website.
• The UMF number. Must be 5 or above to carry any real UMF designation. "UMF 1+" or similar is not a meaningful grade.
• Country of origin: New Zealand. Mānuka honey is legally defined as a product of New Zealand. Imported "Mānuka-style" honeys from other countries are not the same thing.
• Batch traceability. Better producers can tell you which region and which season's harvest is in your jar.

Storing Your Honey and Getting Value From It

MGO in Mānuka honey actually increases over time as DHA converts. A jar properly stored at room temperature in a sealed container will often be more potent at 18 months than on the day it was bottled. This is different from most foods.

What degrades Mānuka honey: heat and direct sunlight. Don't store it near the hob, don't refrigerate it (unnecessary and makes it hard to use), and don't stir it with a wet spoon. A dry pantry shelf is all it needs.

"I was nervous about spending that much on a jar of honey. Now I'd never go back. I use less of it than I expected (a teaspoon in the morning) and the jar lasts for months."

Sandra K., Christchurch

Common Questions About UMF Ratings

Q: What does UMF actually stand for?
UMF stands for Unique Mānuka Factor. It's a grading standard managed by the UMF Honey Association (UMFHA), an independent New Zealand body.

Q: Which UMF grade should I buy if I'm new to Mānuka honey?
Start at UMF 15+. It's the grade where flavour, compound concentration, and price-per-use align. Lower grades may not show you what the conversation is about. Higher grades cost more than most daily routines need.

Q: Is UMF the same as MGO?
No. MGO measures one compound (methylglyoxal). UMF measures four (leptosperin, DHA, MGO, HMF) and includes authenticity verification. UMF is the more complete certification.

Q: Can Mānuka honey lose potency over time?
No, the opposite. MGO continues to increase as DHA converts. A properly stored jar at 18 months can have higher MGO than the day it was bottled. Heat and direct sunlight are the only real degradation risks.

Q: Is UMF 25+ worth the cost for everyday use?
For most people, no. UMF 25+ is appropriate for specific clinical or acute use cases. Daily users get better value at UMF 15+.

Q: How do I verify a UMF label is genuine?
Every licensed producer has a UMFHA licence number printed on the jar. Look it up on the UMFHA website to confirm the producer is currently licensed and the grade is verified.

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Which Jar to Start With

If you're new to Mānuka honey and want a genuine first experience, start at UMF 15+. Go lower and you may not see what the conversation is about. Go higher and you're paying for potency most daily routines don't require.

If you're already using UMF 10+ and finding it works for your mornings, UMF 15+ is a worthwhile step up. Not a different product, but a more concentrated version of the same thing.

Our NZ Country Mānuka Honey is UMF-certified, East Cape sourced, and batch-traceable. The number on the label means what it says, verified by an independent body, not a marketing department.