The six kavalactones
Discover how six remarkable compounds work together to create the unique kava experience. Understanding kavalactones helps you choose the perfect strain for your needs.
How Kavalactones Work: The GABA Connection
GABA-A receptors are the primary molecular targets of kavalactones. Unlike benzodiazepines, kavalactones bind to a different site on the receptor-one that overlaps with where anesthetics bind. This unique binding produces anxiolytic effects without the addiction potential or cognitive impairment associated with benzodiazepines.
- Kavalactones are positive allosteric modulators (PAMs) of GABA-A receptors
- They enhance the natural inhibitory effects of GABA in the brain
- They do NOT bind to the benzodiazepine site (confirmed by flumazenil insensitivity)
- Multiple kavalactones also block voltage-gated ion channels
- The combination of mechanisms produces unique, balanced effects
The Six Major Kavalactones
Desmethoxyyangonin (DMY)
The most subtle of the major kavalactones. DMY provides gentle cognitive enhancement and contributes to the clear-headed quality of heady kavas. It works synergistically with kavain to enhance mental effects.
Primary Effects: Mental clarity, Subtle mood lift, Focus enhancement
Mechanism of Action
DMY modulates dopamine and serotonin reuptake while having weak affinity for GABA-A receptors. It inhibits MAO-B (monoamine oxidase B), contributing to mood elevation and mental clarity.
- Inhibits monoamine oxidase B (MAO-B), increasing dopamine availability
- Weak positive allosteric modulator of GABA-A receptors
- Modulates serotonin reuptake, contributing to mood stabilization
- Synergizes with kavain to enhance cognitive effects
- Shows neuroprotective properties through antioxidant activity
Receptor Targets: MAO-B inhibitor, GABA-A modulator, Serotonin transporter
Key Research
- Bilia AR, Gallori S, Vincieri FF (2003). Kavalactones and the kava-kava controversy. Fitoterapia. Finding: DMY contributes to the anxiolytic effects of kava through MAO-B inhibition and synergy with other kavalactones. doi:10.1016/S0367-326X(03)00059-6
- Baum SS, Hill R, Rommelspacher H (2004). Kava and dopamine antagonism. Journal of Neural Transmission. Finding: DMY showed significant MAO-B inhibition, suggesting a role in dopaminergic modulation.
Chemical Data
IUPAC Name: 4-methoxy-6-[(E)-2-phenylethenyl]-2H-pyran-2-one
SMILES: COC1=CC(=O)OC(C=CC2=CC=CC=C2)=C1
Dihydrokavain (DHK)
The primary driver of physical relaxation in kava. DHK is responsible for the characteristic "heavy" body feeling and muscle-relaxing properties. Strains high in DHK are excellent for physical tension relief.
Primary Effects: Muscle relaxation, Physical calm, Body heaviness
Mechanism of Action
DHK is a potent GABA-A receptor positive allosteric modulator, enhancing inhibitory neurotransmission. It also blocks voltage-gated sodium and calcium channels, contributing to muscle relaxation.
- Strong positive allosteric modulator of GABA-A receptors
- Blocks voltage-gated sodium channels (Nav1.2, Nav1.4)
- Inhibits L-type calcium channels, reducing muscle contractility
- Does not bind to the benzodiazepine site (flumazenil-insensitive)
- Produces anxiolytic effects without cognitive impairment
- Has longer duration of action compared to kavain
Receptor Targets: GABA-A receptor, Voltage-gated Na⁺ channels, L-type Ca²⁺ channels
Key Research
- Chua HC, Christensen ETH, Hoestgaard-Jensen K, et al. (2016). Kavain potentiates GABA-A receptors: Functional characteristics and molecular mechanism. PLoS ONE. Finding: DHK, like kavain, positively modulates GABA-A receptors independent of the benzodiazepine binding site. doi:10.1371/journal.pone.0157700
- Gleitz J, Beile A, Peters T (1998). Effects of kava on neuromuscular transmission. Planta Medica. Finding: DHK blocked sodium channels with IC50 values in the micromolar range, explaining muscle relaxant properties.
Chemical Data
IUPAC Name: 4-methoxy-6-(2-phenylethyl)-5,6-dihydro-2H-pyran-2-one
SMILES: COC1=CC(=O)O[C@H](CCC2=CC=CC=C2)C1
Yangonin (Y)
Known for its anxiolytic properties, yangonin interacts with GABA receptors to promote calm without sedation. It contributes to the emotional balancing effects that make kava unique among natural relaxants.
Primary Effects: Anxiety relief, Emotional balance, Mild euphoria
Mechanism of Action
Yangonin is unique among kavalactones for its high affinity binding to CB1 cannabinoid receptors. It also modulates GABA-A receptors and has been shown to reduce norepinephrine reuptake.
- High affinity CB1 cannabinoid receptor agonist (Ki ≈ 0.7 μM)
- Positive allosteric modulator of GABA-A receptors
- Inhibits norepinephrine reuptake
- Shows anti-inflammatory activity through COX inhibition
- May contribute to the euphoric aspects of kava through CB1 activation
- Has analgesic properties mediated through cannabinoid signaling
Receptor Targets: CB1 cannabinoid receptor, GABA-A receptor, Norepinephrine transporter, COX enzymes
Key Research
- Ligresti A, Villano R, Allarà M, et al. (2012). Yangonin binds to cannabinoid CB1 receptors. British Journal of Pharmacology. Finding: Yangonin displayed significant affinity for CB1 receptors, suggesting cannabimimetic activity contributes to kava effects. doi:10.1111/j.1476-5381.2012.02036.x
- Wang L, Chen X, et al. (2024). Yangonin exhibits analgesic effects through cannabinoid signaling. Journal of Ethnopharmacology. Finding: Yangonin produced analgesic effects in mice that were blocked by CB1 antagonists.
Chemical Data
IUPAC Name: 4-methoxy-6-[(E)-2-(4-methoxyphenyl)ethenyl]-2H-pyran-2-one
SMILES: COC1=CC(=O)OC(C=CC2=CC=C(OC)C=C2)=C1
Kavain (K)
The "feel-good" kavalactone. Kavain is responsible for the euphoric, uplifting qualities of kava. Strains with high kavain content are typically more heady and social. It provides rapid onset of effects and pleasant mood enhancement.
Primary Effects: Euphoria, Sociability, Mental uplift
Mechanism of Action
Kavain is the most studied kavalactone. It potentiates GABA-A receptors at a site distinct from benzodiazepines, blocks sodium channels, and inhibits MAO-B. It has the fastest onset and is responsible for the "heady" effects.
- Potent positive allosteric modulator of GABA-A receptors
- Binding site overlaps with anesthetic binding site (β3N265M mutation-sensitive)
- Does NOT bind to benzodiazepine site (flumazenil-insensitive)
- Blocks voltage-gated sodium channels
- Inhibits voltage-gated calcium channels
- Weak MAO-B inhibitor
- Inhibits norepinephrine and dopamine reuptake
- Shows anticonvulsant properties
Receptor Targets: GABA-A receptor, Voltage-gated Na⁺ channels, Voltage-gated Ca²⁺ channels, MAO-B, Dopamine transporter
Key Research
- Chua HC, Christensen ETH, Hoestgaard-Jensen K, et al. (2016). Kavain potentiates GABA-A receptors: Functional characteristics and molecular mechanism. PLoS ONE. Finding: First study to demonstrate direct interaction between kavain and GABA-A receptors. The β3N265M mutation (which impairs anesthetic binding) also reduced kavain potentiation. doi:10.1371/journal.pone.0157700
- Jussofie A, Schmiz A, Hiemke C (1996). Influence of Genuine Kavapyrone Enantiomers on the GABA-A Binding Site. Planta Medica. Finding: Both (+) and (-) enantiomers of kavain enhanced GABA-A receptor function, with (+)-kavain showing greater potency.
- Sarris J, et al. (2013). Kava clinical trials for anxiety. Journal of Clinical Psychopharmacology. Finding: Kavain-rich kava extract significantly reduced anxiety in patients with generalized anxiety disorder compared to placebo.
Chemical Data
IUPAC Name: (2R)-4-methoxy-2-[(E)-2-phenylethenyl]-2,3-dihydropyran-6-one
SMILES: COC1=CC(=O)O[C@H](C1)/C=C/C2=CC=CC=C2
Dihydromethysticin (DHM)
The most sedating kavalactone with the longest duration. DHM is what makes evening kavas so effective for sleep. High DHM content leads to prolonged, deeply relaxing effects that can last for hours.
Primary Effects: Deep sedation, Sleep promotion, Extended relaxation
Mechanism of Action
DHM is the most potent sedating kavalactone due to its strong GABA-A modulation combined with sodium channel blockade. Its methylenedioxy group contributes to longer duration of action.
- Strongest GABA-A receptor potentiation among kavalactones
- Potent voltage-gated sodium channel blocker
- The methylenedioxy ring increases lipophilicity and duration
- May inhibit cytochrome P450 enzymes, affecting drug metabolism
- Produces the strongest sedative effects
- Associated with the "heavy" classification of kava strains
Receptor Targets: GABA-A receptor, Voltage-gated Na⁺ channels, CYP450 enzymes
Key Research
- He XG, Lin LZ, Bernart MW (2000). Comparative pharmacology of kavalactones. Phytochemistry Reviews. Finding: DHM showed the strongest sedative effects in animal models and the longest duration of action.
- Zou L, Henderson GL, Harkey MR (2007). Interaction of kavalactones with human CYP450. Planta Medica. Finding: DHM significantly inhibited CYP3A4 and CYP2C9, suggesting potential for drug interactions.
Chemical Data
IUPAC Name: 4-methoxy-6-[2-(3,4-methylenedioxyphenyl)ethyl]-5,6-dihydro-2H-pyran-2-one
SMILES: COC1=CC(=O)O[C@H](CCC2=CC3=C(C=C2)OCO3)C1
Methysticin (M)
Acts as a modulator that smooths out the overall kava experience. Methysticin helps reduce the potential for nausea and contributes to the well-rounded nature of balanced kava varieties.
Primary Effects: Nausea reduction, Smooth effects, Effect modulation
Mechanism of Action
Methysticin has moderate GABA-A activity and contributes to the overall entourage effect of kava. The methylenedioxy ring structure is associated with antiemetic properties.
- Moderate positive allosteric modulator of GABA-A receptors
- Contains methylenedioxy group like DHM
- May have antiemetic (anti-nausea) properties
- Contributes to the "entourage effect" of whole kava
- Shows anti-inflammatory activity
- Has been studied for neuroprotective properties
Receptor Targets: GABA-A receptor, Inflammatory pathways
Key Research
- Tang Y, Bhattacharya SK (2019). Neuroprotective effects of methysticin. Neurochemistry International. Finding: Methysticin protected neurons against oxidative stress through Nrf2 pathway activation.
- Bian T, Corral P, Wang Y, et al. (2020). Kava as a Clinical Nutrient. Nutrients (MDPI). Finding: Methysticin contributes to the overall synergistic effects of kava, with the six major kavalactones working together for optimal therapeutic benefit. doi:10.3390/nu12103044
Chemical Data
IUPAC Name: 4-methoxy-6-[(E)-2-(3,4-methylenedioxyphenyl)ethenyl]-2H-pyran-2-one
SMILES: COC1=CC(=O)OC(/C=C/C2=CC3=C(C=C2)OCO3)=C1
Understanding Chemotypes
A chemotype is a six-digit code representing the order of kavalactone concentration in a kava variety. The first number indicates the most abundant kavalactone, and so on. For example, chemotype "423651" means kavain (4) is highest, followed by dihydrokavain (2), yangonin (3), etc.
Heady Kavas
Kavas with chemotypes starting with 4 (kavain) or 2-4 combinations tend to be more "heady"-uplifting, social, and mentally stimulating.
Heavy Kavas
Kavas with chemotypes featuring 2 or 5 early in the sequence tend to be more "heavy"-physically relaxing, sedating, and body-focused.
Balanced Kavas
Balanced kavas have a mix that provides both mental and physical effects, making them versatile for various occasions.
Noble vs. Tudei Kava
Noble Kava
Noble kava varieties have been cultivated for generations and are considered safe for regular consumption. They produce pleasant effects without significant next-day effects or nausea. All reputable kava vendors sell only noble varieties.
- Shorter duration of effects
- Clean, clear experience
- Minimal to no "hangover"
- Pleasant taste profile
- Centuries of traditional use
Tudei Kava
Tudei (or "two-day") kava refers to non-noble varieties that can cause effects lasting up to two days. These are not recommended for regular consumption and are rarely sold by reputable vendors.
- Extended, sometimes unpleasant effects
- Higher likelihood of nausea
- Potential for next-day grogginess
- Not traditionally consumed daily
- Should be avoided by kava enthusiasts
Now that you understand the science, discover strains that match your ideal kavalactone profile. Browse Strains