Eating junk food can have a major negative impact on one's health. Though many people enjoy eating junk food and think it tastes great, the health risk and consequences can be very effective, and can range from everything to low energy levels to weight gain and illness. The term "junk food" encompasses a fairly broad category of food, but it typically refers to foods that are relatively high in caloric content, but low in nutritional value. Junk food is often high in sugar, salt, and fat, particularly saturated fat. It is often heavily processed and prepackaged, making it easy to prepare and eat.