Usually, fast food is higher in soya, fat, sugar, oil, fried meat, salt, cheese, mayonnaise and obviously calories. The greatest disadvantage of fast food is the adverse effect that it has on one's health. It is a fact that fast food is more unhealthy than home-cooked meals, as it contains higher amounts of unwanted nutrients like salt, fat and various types of additives (artificial chemicals). It may contain harmful bacteria too. Frying destroys most of the essential nutrients from the food. Very small amounts of vegetables and fruits are normally present in fast food. Moreover, 'serving larger portions' when most people don't need extra portions has led to several health problems. We require a small amount of salt to maintain the health of the cells and tissues. Fast food being rich in salt, adversely affects the heart health and the overall health of an individual. Such type of food is an important contributor to obesity in the American population. Obesity is on the rise, and a direct link is being cited between fast food and obesity in children.
Given the sedentary lifestyle that we lead today, the excess fats and calories that we take in with fast food is not used up completely. The result is that these accumulate in our body as fat deposits that cause complications like cardiovascular diseases and other related diseases of the heart. With obesity come other problems like high blood pressure and diseases of the joints. It is like a chain reaction set off by fast food and carried forward by our unhealthy lifestyle. In fact, a recent study has shown that people who live within walking distance of a fast food restaurant are at 13% higher risk of suffering from strokes than those who live a considerable distance away.
The greater the number of people at a meal in a fast food restaurant, the larger is the bill. Eating at fast food outlets is economical only for a single person. Going out to a fast food eating joint with family once in a while won't matter...