Lots of information coming up with regards to some of the aromatic compounds exerting effects neither through supplementation nor diet. There seems to be a fair bit of them to induce anxiety, limonene seems to be able to in conjuction with another compound reduce anxiety and chocamine was able to suppress appetite when smelt.
Definitely some potential manipulation lays here.
- A systematic review on the anxiolytic effects of aromatherapy on rodents under experimentally induced anxiety models
- Anxiolytic effect and tissue distribution of inhaled Alpinia zerumbet essential oil in mice