2, there are tea polyphenols in black tea, thearubigins and caffeine can refresh, but also can reduce fat and lose weight. But in the evening, we must pay attention to eating less sweets, high-sugar fruits and heavy-flavored foods. It is best to eat more fresh vegetables and fruits. At the same time, be sure not to eat for three hours before going to bed. The time to eat at night should end before 5 o'clock every day, mainly because of the small amount of activity and low energy consumption at night. If we eat too much, our bodies will become fat.