Zest tea premium energy tea contains 155 mg. Of caffeine per serving to get you energized. L-theanine, an amino acid, is also included to promote extended energy and alertness, and reduce the risk of caffeine jitters. Certified gluten-free, this cinnamon apple variety combines orange pekoe black tea with natural apple and cinnamon extracts for a sweet, homespun flavor. This box contains 15 premium energy tea bags.