Junk food is ready-to-eat food that has low nutritional value. Junk food is available in restaurants such as fried chicken, french fries, snacks, pizza, burgers, and sandwiches etc. Junk food is more popular because it tastes good, is quick to serve and is available in strategic places. Junk food promotion has a big role in society, especially teenagers. Junk food should be avoided as it has many dangerous effects on the body, including obesity, diabetes, autism, high blood pressure, cancer and others. This research uses data from the Health Behavior survey of adolescents aged 11-21 years. Results: Consumption of unhealthy foods significantly influences the increase in disease at all ages. It is important to increase teenagers awareness of choosing nutritious food, and using media and technology appropriately.