A cup of tea can ward off cravings, and if you swap your daily sugary blended coffee drink for tea, you can save 250 to 450 calories. In addition, some studies have shown that regular tea drinking combined with diet and exercise may improve weight loss. A study in the The Journal of Nutrition found that compounds called catechins in green tea, when paired with moderate exercise, boosted weight loss and abdom
While up to 400 milligrams of caffeine a day is considered safe for most adults. Even though a cup of tea contains just about 47 milligrams of caffeine, a few cups late in the day may be enough to make falling asleep difficult. Other possible negative side effects of the caffeine in tea include headaches, hypertension, and irritable bowel syndrome, according to the Mayo Clinic.