THE STRENGTH OF FRUIT KNOWLEDGE

I'm about to fill this knowledge hole by looking it up on the internet, but I'm wondering if I'm not the only one who has it. Behold:

- Apples. "An apple a day keeps the doctor away"
- Oranges. Vitamin C
- Bananas. Potassium
- Cranberries. Vitamin C?
- Pineapples. ??????

What are pineapples good for, aside from being fruit? Does anyone else not know this off the top of their head? And come to think of it, I'm not exactly sure how apples promote health. This just occurred to me because I love pineapples to the point where I suspect they're actually not good for you, based on how awesome they taste.