The saying "an apple a day keeps the doctor away" serves as a helpful reminder while grocery shopping. But have you ever spotted a particularly shiny apple at the supermarket and wondered whether the ...

Add Yahoo as a preferred source to see more of our stories on Google. Hand holding supermarket apple with a glossy wax coating against blurred apple background. - Wang Yukun/Getty Images Shiny red ...

When you were younger, you may have gone to an elderly relative's house and, feeling peckish and not particularly craving butterscotch, reached for an enticing-looking apple sitting in a bowl.