Whether or not instant coffee is harmful to the body is mainly related to the amount of coffee consumed; a small amount will not cause significant damage, while a large amount of coffee will increase the risk of cardiovascular and cerebrovascular diseases. Drinking a moderate amount of instant coffee once in a while is usually not harmful to the body. However, if you drink a lot of instant coffee for a long period of time, it will easily cause some harm to your body. Instant coffee, the main ingredients of which are coffee, phytolacca, sugar, etc., and will also be added to the food flavor, thickening agent and other additives, so the instant coffee itself belongs to the high-calorie, high-sugar food, while the phytolacca contains more trans fatty acids, long-term intake of the human body will indeed be harmful, increase the risk of cardiovascular disease, diabetes and other diseases. Instant black coffee does not contain sugar, trans fatty acids, etc., and can be consumed for a long time. If necessary, you can choose instant black coffee, which is relatively healthier.