Q. What happens to you if you eat more than one apple a day?
I realize this question was meant to be humorous, but there is a serious answer. There is a three-apple-a-day diet, which I'll get to later. But, first, let's discuss a single apple a day.
We have to go back in time to Wales to find the origins of "An apple a day keeps the doctor away."
The earliest known record of the maxim is in an 1866 edition of Notes and Queries magazine:
A Pembrokeshire proverb. Eat an apple on going to bed, And you'll keep the doctor from earning his bread.