Tulsi contains eugenol, rosmarinic acid, and other phytochemicals with anti-inflammatory, antimicrobial, and adaptogenic properties. Clinical studies show benefits for blood sugar regulation and the antibacterial properties are relevant for oral health.
As an adaptogen, tulsi reduces cortisol responses to stress. Regular tulsi tea consumption is low-risk for most adults, though it mildly thins blood and should be avoided before surgery and by people on anticoagulants.