CBSE Class 10 Answered

Junk food contains too much sugar and too much salt. This can negatively affect the health both in the short term and the long term. Junk food can lead to stomach fat and obesity.
Effects:
i. Lack of energy:
This is known as a short-term adverse effect resulting from eating junk foods. As junk foods don't provide us with essential nutrients.
ii. Heart Diseases:
Junk food diet is a major cause of heart diseases. Myocardial infarction (a severe heart failure) is due to plaque formation in arteries which demands heart to put in extra effort to pump blood on the down stream.
iii. High Cholesterol:
Apart from forming plaques and constricting arteries, cholesterol also affects liver where it is metabolized. High cholesterol from junk food and diet strains liver damaging it eventually. This is a long term effect.