Question

expansion of Idea on an apple a day keeps the doctor away

Answer 1

The saying "an apple a day keeps the doctor away" probably gives you the impression that apples are the healthiest fruits. This proverb was first mentioned more than a century ago, and it is still widely used today. Other than the fact that it is easy to remember and fun to say, it may also be true to a certain extent; otherwise, it would not have enjoyed such popularity for such a long time.