Healthy adults should not consume more than 400 mg of caffeine every day, because this amount of caffeine may cause adverse reactions such as body tremor, rapid heartbeat, nausea and anxiety, dizziness, insomnia and even heart failure. ?

Arabica coffee beans are mostly used for black coffee, and the caffeine content is about 0.9- 1.2%. If it is assumed that caffeine accounts for 1%, a cup of hand-brewed coffee is 225ml, and the ratio of coffee powder to water is 1: 15, it means that 15g of coffee is used, and the caffeine content is about 15g.

Tips:

Studies show that after drinking black coffee for 40 minutes, the concentration of fatty acids in human blood will rise to the highest level, which is the best time to lose weight by exercise, because fatty acids will promote the decomposition of fat and make exercise slimming more effective. Therefore, if you want to help burn fat and lose weight by drinking black coffee, drinking a proper amount of black coffee half an hour before exercise will bring better slimming effect.