2, drinking coffee can also appropriately suppress appetite, which is very beneficial to patients who lose weight. It is best to drink coffee in the morning and avoid drinking it at night during weight loss. Because drinking coffee at night will affect sleep, and poor sleep will easily affect the quality of weight loss. Patients who often stay up late are prone to stress obesity. Because they don't sleep at night, they tend to eat more food and sleep less. Especially at night, the secretion of certain hormones will be inhibited, so it is best to drink coffee in the morning during weight loss.