香りの科学

People can differ greatly in how intensely they perceive the same musk. A study analyzing 1,357 people in China and New York helps explain differences in odor receptors and what genes alone cannot account for.

A four-week trial combining forest-associated scent with hypnosis audio increased subjective calmness compared with rest alone. However, a distinct benefit from adding scent and conditioning that later allowed scent alone to evoke calmness were not established.

A scent trial at four dental practices enrolled 515 people and analyzed 486, finding no statistically clear overall difference in anxiety. We distinguish additional analyses in women and other groups, scent types, and the conditions of real clinical settings.

A 24-hour nasal-airflow study found differences in within-breath peaks and sleep patterns in congenital anosmia, not a validated diagnostic test.