Are you tired?

Bag a new brew
Boost your energy with white tea, which has a delicate flavor that requires little sweetening. "Of all the teas, white tea goes through the least processing," says Iman Hakim, M.D., Ph.D., a professor at the Mel and Enid Zuckerman College of Public Health at the University of Arizona in Tucson and a leading researcher on the benefits of tea. As a result, white tea has the highest concentration of L-theanine, an amino acid that, according to recent research, stimulates alpha brain waves to boost alertness while producing a calming effect. And because a cup of white tea contains less caffeine (15 milligrams) than other teas (up to 50 mg) and coffee (120 mg), it's more hydrating, another key for sustaining energy.