https://en.wikipedia.org/wiki/Perilla_frutescens

Asian herbalists have used Shiso for centuries to treat flu and colds thanks to its antiviral and antibacterial properties. It is commonly used as well as a food preservative and aromatic culinary ingredient. Shiso scent is green in essence with sweet and minty notes and a water quality in it. It is a very soothing aroma inviting to relaxation and meditation.