Supplement × Supplement·a caution·Emerging evidence
Both can impair alertness; kava also carries liver safety concerns.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
What is happening. Both can impair alertness; kava also carries liver safety concerns.
Mechanism. Additive CNS depression and psychomotor impairment.
Recommendation. Avoid routine stacking and do not combine before driving, alcohol use, or sedative medication use.
Effect on the composite score
If both Kava and Melatonin are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
Every claim on this page is cited. PMIDs link straight to PubMed.
Check your full routine
Drop your supplements and prescriptions into NutriStack and it runs every pair at once: every interaction, synergy, timing rule, and contraindication, each linked to its primary source.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
NutriStack