Three botanicals go into the pot: a quarter teaspoon of spikenard root, a sixteenth of a teaspoon of lavender buds, and a pinch of star anise, water just off the boil poured over them, covered, for eight to ten minutes. That matches the European Medicines Agency's definition of an infusion: boiling water over the herb, standing five to fifteen minutes. Spikenard supplies jatamansone, the same resinous sesquiterpene as the plain root tea; lavender, the smallest amount in the pot, sits as a top note rather than competing with it, its linalool measured at 33.6 to 46.1 percent of the oil. Star anise, at a pinch, is here for a thread of anethole rather than a flavor of its own.
Two kinds of thin evidence sit inside this cup. Spikenard's sedative reputation rests on animal and lab work rather than sleep trials: the Journal's note on spikenard flags dated methods and missing toxicology, and notes that the best human study measured blood pressure in hypertensive adults, not sleep. Lavender's better-documented calm belongs to Silexan, a licensed oral capsule, not to buds in hot water; the Journal's note on herbs for chronic stress walks through the trial behind it, five trials and 1,213 patients in which Silexan beat placebo by 2.9 points on the Hamilton Anxiety scale, a small-to-moderate effect, every one of them funded by the company that makes it. No independent trial exists.
The full eight to ten minutes lets the root give up its resin under the lavender; less yields mostly flower. One caution: Nardostachys jatamansi is Critically Endangered, its Himalayan wild population down more than eighty percent in the decade the IUCN measured. Buy the smallest amount a supplier will sell, in grams; lavender and star anise need no such caution.