What Are Kavalactones?
Kavalactones are a family of compounds found primarily in the root and rootstock of Piper methysticum. They're responsible for kava's characteristic effects: a calming, relaxed feeling and the mild numbing sensation on the lips and tongue. A given batch of kava root typically contains a mix of several kavalactones rather than just one, and it's the specific mix, not any single compound, that shapes the overall experience.
The Six Major Kavalactones
Six kavalactones account for the large majority of kava's activity, and each is conventionally assigned a number used in chemotype notation:
1. Desmethoxyyangonin (DMY) — associated with mild MAO-B inhibition and mood effects.
2. Dihydrokavain (DHK) — one of the more abundant kavalactones in many noble cultivars.
3. Yangonin — contributes to kava's characteristic yellow root colour.
4. Kavain — often the dominant kavalactone in noble cultivars, associated with a relatively fast, clean onset.
5. Dihydromethysticin (DHM) — tends to be more prominent in tudei-type cultivars.
6. Methysticin — present across most cultivars in varying amounts.
How Chemotypes Are Written
A chemotype is written as a sequence of these six numbers, ordered from the most abundant kavalactone to the least. For example, a cultivar where kavain is most abundant, followed by desmethoxyyangonin, then yangonin, and so on, might be written as a sequence starting with 4. This numeric shorthand is a standard way labs and researchers communicate a cultivar's kavalactone profile without listing full compound names every time.
Broadly, noble cultivars tend to lead with kavain (4) or dihydrokavain (2), while tudei-type cultivars tend to lead with, or carry a much higher proportion of, dihydromethysticin (5). Exact code sequences can vary slightly between labs and sources, so the pattern matters more than memorising one specific numeric code.
Why Chemotype Matters for Effects and Safety
Chemotype is the actual chemical basis for the noble-versus-tudei distinction covered in our Noble Kava vs Tudei Kava guide. A kavain-led chemotype is generally associated with a cleaner, more predictable effect, while a dihydromethysticin-led chemotype, often paired with higher flavokavain B, a separate compound linked to liver cell toxicity, is associated with harsher, longer-lasting effects. This is why reputable vendors increasingly disclose chemotype alongside cultivar name, it's a more precise way to verify what you're actually getting than the cultivar name alone.
