Patchouli: a calming signal, and a word on sourcing.

Patchouli is the deep, earthy spine of both the Grounding and Night blends, and unusually for such a heavy note, it has a plausible calming signal in the research. In a 2002 study measuring the autonomic nervous system in healthy adults, patchouli inhalation produced roughly a 40% drop in relative sympathetic (“fight-or-flight”) activity — one of the larger effects among the fragrances tested, on par with rose. A 2020 randomised controlled trial of fifty emergency-room nurses found that short-term patchouli inhalation significantly reduced stress and raised compassion satisfaction over a shift.

What the 2020 trial is careful about

It's a real randomised controlled trial, which is the strongest design in this field — but it also reported no significant change in blood pressure or heart rate, and its stress and well-being outcomes were self-reported in a high-stress workplace. So the honest reading is: patchouli is associated with feeling less stressed and, in one lab study, with a measurable calming shift in the nervous system — not with treating anything.

On the oil itself — a sourcing note, not a research claim

Patchouli varies enormously by origin. We use Indonesian patchouli — the plant's native home, grown on Sulawesi and Sumatra — prized for a deeper, sweeter, more rounded profile than the sharper, greener material from other regions. That's a quality-and-character choice, and we want to be clear it's separate from the research above: the studies are about patchouli as a scent, not about any one origin being more effective.

Why it's in the candles

Patchouli is what makes Grounding feel grounded and Night feel like the bottom of the day. The calming research is a welcome bonus to a note we chose for its depth.