Basil prevents cancer, improves mood, reduces stress, and helps with the flu. Basil leaves come in a variety of flavours, including sweet, Greek, Thai, holy, cinnamon, and lettuce basil, each with its own set of health advantages. Sweet basil is beneficial to both the heart and the brain since it lowers blood pressure, cholesterol, and improves mental alertness. On the other hand, some types, like as holy basil, have been shown to help control blood sugar levels.