From a TCM (Traditional Chinese Medicine) perspective, basil is well known for Lifting the Spirit, Tonifying Yang, and Supporting the Lungs.
It has long been used in foods and as a medicine to clear infections, even from cuts and bruises, as well as treat colds and flu.
It also helps to improve the circulation of Blood.
Basil is an adaptogenic herb that can help the body cope with symptoms of stress such as lethargy, anxiety, headaches, and irritability.
Note that basil (Ocimum basilicum) is a different plant than holy basil, or tulsi (Ocimum tenuiflorum). Both are in the mint family.