Pineapple is a large tropical fruit with a spiky, tough skin and sweet insides. When European explorers came across it in South America in the 17th century, they called it a pineapple because of its pinecone appearance. The scaly bumps on the outside are called “eyes.” Slice it open, and you’ll find bright yellow flesh that’s both sweet and tart. The vitamins and minerals in pineapple could help shorten viral and bacterial infections and strengthen your bones.