"An apple a day keeps the doctor away."

This means that if you eat a healthy diet, especially including fruits pke apples, you are less pkely to get sick and need to see a doctor.

Another saying that is similar is "You are what you eat." This means that the food you eat affects your overall health and well-being. If you eat a healthy diet, you are more pkely to be healthy, but if you eat unhealthy foods, it can have negative effects on your health.

Here are a few more sayings that relate to healthy eating:

"Eat your greens." This means to eat a lot of vegetables, which are typically very healthy for you.

"Everything in moderation." This means that it's okay to enjoy unhealthy foods occasionally, but it's important to balance them with a mostly healthy diet.

"You can't outrun a bad diet." This means that even if you exercise a lot, if you are not eating a healthy diet, it can still have negative effects on your health.