Tulsi, also known as holy basil, is the most sacred herb of India. In Ayurvedic medicine (an ancient health-care model from India), Tulsi is used for balancing the chakras, or energy wheels, of the body. The nerve tonic fights stress and free radicals and also supports optimal respiratory function. Just like Rhodiola, Tulsi is an adaptogen, a metabolic regulator which harmonizes the whole body. You know that paradoxical feeling when you're physically utterly exhausted but your mind is spinning out of control? That's where Tulsi comes in with its simultaneously calming and energizing effects. Added bonus: Tulsi is also high in disease-fighting antioxidants.