In the recent years, a lot of health issues come from people’s eating habits. Many people tend to purchase junk food because it is more convenient and cheaper. Sometimes the fast food restaurants provide discount price on full meals because they want to attract more customers. Most of the fast foods contain saturated fat, sodium and artificial colours, which lead to big health problems in long-term. In this essay, we will further examine why the government should put on tax to unhealthy food.