Herbal Tea Concentrate contains caffeine which jump-starts your metabolism and provides a boost to help you feel revitalized. For optimum experience, mix a little more than ½ teaspoon with 8 ounces of water. This refreshing, low-calorie tea is available in a variety of flavors. Key Benefits Jump-starts thermogenic (metabolic) activity Boosts the feeling of energy Provides antioxidant support Instant and low-calorie