Can green tea reduce fat?

It is recorded in the Tang Dynasty that the function of tea is "to lose weight after eating for a long time". There is a saying among the ethnic minorities in China's border areas that "tea is indispensable for a day". Because tea helps digestion and reduce fat, in today's fashionable language, it is helpful to "reduce fat". This is because caffeine in tea can increase gastric juice secretion and help digestion. In addition, green tea is rich in catechins, which helps to reduce abdominal fat.