500 calories. Milk tea is a drink with high sugar, high fat and high calorie. Milk tea contains essence. The calorie of mo-boiled taro, sweet-scented osmanthus and oolong milk tea is 500 calories. The main component of essence is hydrogenated vegetable oil, which is a trans fatty acid. It is not easy to be digested by human body after ingestion, and it is easy to accumulate in the abdomen. Drinking a lot of milk tea can easily lead to obesity. And if you drink it before going to bed, it will increase the burden on the stomach, and the sugar in milk tea will be converted into fat, so it is best to drink less milk tea.