Kava Chemotypes Explained: The Six Kavalactones and the Numbers on Your COA (2026)

A chemotype is the six major kavalactones ranked from most abundant to least and written as a six-digit code — for example, the noble cultivar Borogu's 423561. Each digit stands for one kavalactone in the fixed Lebot numbering (1 = desmethoxyyangonin, 2 = dihydrokavain, 3 = yangonin, 4 = kavain, 5 = dihydromethysticin, 6 = methysticin), and the order is the order those kavalactones finished in by concentration. The chemotype describes a kava's character — where it sits on the heady-to-heavy axis — which is a different thing from its total-kavalactone potency (the percentage). Read the first digit or two and you know which way the kava is built to pull, before you ever taste it.

Translate each digit to its kavalactone, then read left to right — most abundant first. 423561 is kavain (4) most abundant, then dihydrokavain (2), then yangonin (3), then dihydromethysticin (5), then methysticin (6), then desmethoxyyangonin (1) last. Because it leads with 4 (kavain), it's a heady, clear, balanced, daily-drinkable noble — the Borogu profile. The trick is that the first one or two digits carry almost the whole experience, because the leading kavalactones are present in far larger amounts than the trailing ones. So read the front of the code, note which direction it points, and don't overthink the tail.

Read the first digit. A code that leads with 4 (kavain) skews heady — light, clear, uplifting, sociable, the classic noble daily-drinker direction. A code that leads with 2 (dihydrokavain) leans toward relaxed, heavier body effects. A code that leads with 5 (dihydromethysticin) or 6 (methysticin), or stacks them high, skews heavy — sedating, physical, couch-bound, slower to clear, with more chance of next-day grog. These are tendencies, not guarantees: total dose, your body and tolerance, whether you've eaten, and preparation all shift how a given chemotype actually lands. The code stacks the odds toward a direction; it doesn't dictate the outcome.

They answer two different questions, and you want both. Total kavalactones — a percentage, by HPLC — is potency: how STRONG the kava is (noble root commonly ~6–15%). The chemotype is character: in which DIRECTION it pulls, heady or heavy, based on the ratio of the six kavalactones. Two kavas can share the same potency and feel like opposite drugs because their chemotypes differ — 12% of a kavain-led kava is a bright sociable evening, 12% of a dihydromethysticin-heavy one is a sedating couch night. Read the percentage to dose, read the chemotype to choose the experience. A good Certificate of Analysis prints both.

The chemotype is the front line of that distinction. Noble cultivars — the ones Pacific cultures selected for daily drinking — tend to be kavain-forward (leading with 4) and balanced, like Borogu's 423561. Tudei (non-noble) cultivars run higher in dihydromethysticin (5) and dihydrokavain (2) — the heavy, sedating kavalactones — and notably in flavokavain B, a chalcone that isn't a kavalactone (so it's not in the six-digit code) but is associated with the heavier, longer, groggier 'two-day' after-effects tudei is named for. A kavain-led chemotype plus low flavokavain B and an explicit noble verification is the daily-drinker green light; a 5-and-6-heavy code with high flavokavain B is the tudei signature. The full story is in our Noble vs. Tudei guide.

Because in most markets nothing requires them to. Kava labeling isn't standardized the way nutrition facts are, so disclosing a chemotype is voluntary — and a brand faces no penalty for staying silent. Some don't test their material thoroughly enough to state a confident profile; some find a big potency number more flattering than committing to a character. That's exactly why a printed chemotype is worth seeking out: a brand that publishes the code (and ideally a noble verification) is telling you it knows its cultivar and its lab work. On our bar, a kava we can't read on both potency and character is one we don't rank — not because it's necessarily bad, but because guessing the most important variable isn't a recommendation. See How We Research for the full standard.

No — the chemotype is about direction, not quality, and 'better' depends entirely on what you want. A kavain-led (starts-with-4) code is widely preferred for daily, balanced, heady sessions, which is why noble cultivars like Borogu are so prized. But someone seeking deep, sedating, end-of-night relaxation might deliberately want a heavier, dihydromethysticin-forward profile. The chemotype tells you which experience a kava is built to deliver; it can't tell you which experience is right for your evening. And it says nothing about potency or purity — a 'good' code on a weakly extracted or contaminated kava is still a poor buy. Read the chemotype for character, the percentage for strength, and a COA's microbial and heavy-metal panels for safety.