What is the main idea of this passage?

Eating healthy requires maintaining a balanced diet. Although “fad diets” are constantly being circulated, they are actually more harmful to your body than maintaining a balanced diet. “Fad diets” will often try to promote a certain food that will rid the body of fat. For example, grapefruit and lemons are frequently added to diets because they supposedly combat fats with their acidity. Despite whether this claim is true, the more important question is, are you really going to eat grapefruit at every meal for the rest of your life? Probably not. You are more likely to stay healthy by eating a variety of fruits and vegetables. You will enjoy the various flavors, and you will get the many different nutrients your body needs. Finding a healthy balance that works for you is much healthier than jumping from one extreme diet to the next.

The main idea of this passage is that maintaining a balanced diet and finding a healthy balance that works for an individual is more beneficial than following "fad diets" that promote certain foods for weight loss.

The main idea of this passage is that maintaining a balanced diet is healthier than following fad diets, which often promote certain foods or extreme restrictions. Eating a variety of fruits and vegetables and finding a healthy balance that works for you is the key to staying healthy.