The scoop: Technically, herbal teas are not teas at all—they’re usually some combination of dried fruits, flowers, and herbs. Herbal varieties contain no caffeine. Avoid herbal weight-loss teas, which may contain dangerous laxatives.
Health benefits: There has been less research on herbal blends than on traditional teas, but one study published in the Journal of Nutrition found that drinking three cups of hibiscus tea daily could help lower blood pressure in people with hypertension. And evidence suggests that chamomile tea may promote sleep and that peppermint tea may calm the stomach.