We shouldn't take the advice of this proverb literally. As Wavingfree said below, this proverb is actually offering general advice. This proverb is a way to help people remember the healthy benefit of eating fruit and vegetables.…"
"I think today it is more than 5 vegetables and fruit that is believed to be a healthy diet. With vegetables better than fruit as fruit has more sugar. However one apple is better than none! So I think the saying is a gentle reminder to a healthy…"