1, the main component of coffee is sugar. If you eat too much coffee sugar, sugar will exceed your daily intake of calories, which will lead to obesity. You can eat a small amount of coffee candy occasionally or every day, but avoid eating too much or too much at once, otherwise it will easily lead to obesity. It is suggested that diabetic patients should try to avoid taking candy such as coffee candy to avoid excessive blood sugar fluctuation and serious complications, such as diabetic ketoacidosis.