Cedarwood, cedrol, and the body winding down.

Cedarwood is the quiet, woody base note that carries across Grounding and Night, and its calming reputation has an identifiable chemistry behind it. Cedrol — cedarwood's primary aromatic compound — has been shown on inhalation to lower heart rate, blood pressure and respiratory rate, and to shift the autonomic nervous system toward its parasympathetic (“rest”) side. A separate study found that cedar essence shortened the time healthy adults took to reach the first stage of sleep during a daytime nap.

What to hold lightly

The autonomic measurements are real and physiological rather than purely self-reported, which is a point in cedarwood's favour. But the human sleep evidence is thin — small samples, a daytime nap rather than a night's sleep — so the honest claim is “shifts the body toward rest,” not “a sleep aid.”

Why it's in the candles

Cedarwood does two jobs: it grounds the resinous Grounding blend and deepens the Night blend toward rest. In both, it's the note pulling the nervous system down a gear.