It is very harmful for our health. It can cause many diseases. For ex. if we will eat more junk food it will make us fat. It also leads to diabetes.IT can develop diseases  related to digestion.It increases the risks of heart diseases and also increases our blood pressure which is one of the most common disease in today's world.Eating too much junk food can make children dull and can create lack of essential nutrients in them. So we should avoid junk food instead we should take healthy diet.

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Junk food contains fat and carbohydrate in large amounts,and nutrients in low amounts.This makes a person obese and unhealthy.

Thus,it is considered to be harmful.