Manuka Health is the brand that grades by the precise MGO number — the actual milligrams of methylglyoxal per kilogram — and this jar is the cleanest expression of that approach because it's UMF-certified on top. It states both MGO 400+ and the UMF 13+ it maps to, triple-tested for potency, with full New Zealand traceability via a QR code that runs back to the beekeeper. So you get an exact potency figure AND independent three-marker certification, not one or the other.
UMF 13+ (MGO 400+) is a genuine, useful middle grade — more potency than an everyday 10+, without quite the price of a 15+. The honest knock is value: at ~$4.75/oz it's priced like a certified 15+ while carrying a 13+ grade. And the usual framing applies: manuka's antibacterial evidence is topical (Mavric 2008, Adams 2008; Jull 2015 Cochrane), so the oral throat-and-immune use is a traditional, soothing ritual, not a clinical promise. Buy it for the verified, exactly-stated grade. Here's the full breakdown.