Chamomile, lavender and star anise go into a warmed pot together, no staging, water poured on just under a boil, about 95°C, then covered five to six minutes; the recipe says stretch that if you want it sleepier. Chamomile's showier chemistry doesn't survive a teapot: what comes out is water-soluble, apigenin still mostly bound to a sugar as its glucoside, and a scatter of flavonoid glycosides, a different mixture from the dried flower, not a weaker version. Lavender adds linalool, 33.6 to 46.1 percent of the flower's oil, and star anise's anethole, 72 to 92 percent of its own oil, rounds the florals with a warm licorice sweetness that keeps the cup comforting rather than sharp.
The evidence lines up cleaner for sleep than for calm, and the size of the effect is smaller than the tagline. The one trial in diagnosed insomnia, using a standardized extract, not tea, gave 34 adults capsules for four weeks and found no difference from placebo; their dose worked out to fifteen grams of chamomile flowers a day, not feasible as tea. The one trial using actual tea, 80 women with poor sleep after childbirth, improved at two weeks, faded by four. Pooled across twelve trials, chamomile improved sleep quality, an effect size of 0.73, and nothing measurable for state anxiety, 0.15, its interval straddling zero. Lavender's better number, 0.35 against placebo on the Hamilton Anxiety scale, belongs to Silexan, and all five trials behind it were funded by its maker. The Journal's notes on chamomile's chemistry and on herbs for chronic stress cover this further.
Steep it the full six minutes for the sleepier version the recipe promises, covered, in a pot that's already warm so the water doesn't lose its heat before the flowers open. One caution: chamomile is a daisy, and the daisy family is a documented allergen. An eight-year-old with ragweed and mugwort allergies had a severe reaction to his first-ever cup, and antibody testing showed the cross-reaction runs straight through the pollen family. If ragweed sets off your hay fever, this is not the tea to try untested.