Junk food contains to much sugar to much salt. This can negatively affect your health both in the short term and the long term.junk food can lead to stomach fat and obesity.
These are the long term and short term effects of junk food:
Lack of energy
This is known as a short-term adverse effect resulting from eating junk foods. As junk foods don't provide you with essential nutrients, even though they can be very much sufficing, you feel weakened. Consuming deficient nutrients could be as a supplement.
This is another result of junk food habit. These are traced to affect in immediate and medium term periods. When you have a sumptuous junk meal rich in oil you feel drowsy and fail to concentrate. Over sustained periods of junk food eating, blood circulation drops due to fat accumulation. Lack of vital oxygen, nutrients and proteins particularly can stale your grey (brain) cells temporarily.
Junk food diet is a major cause of heart diseases. Myocardial infarction (a sever heart failure) is due to plaque formation in arteries which demands heart to put in extra effort to pump blood on the down stream. On the up stream, there is lack of returning blood to heart. This causes two damages to heart - heart fatigues by the continuous extra effort it makes and it suffers oxygen supply. The onset and remedy both take a long time and a great determination to win.
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.