Native to the Atlantic rainforests of Brazil, the Purple Forest guava is round to pear-shaped and develops a dark shade of purple when fully ripe. As a matter of fact, these guavas can be quite acidic and tannic, not to mention that they offer subtle tropical notes of pineapple and berry. Besides, they are a good source of vitamins A and C and fiber, as well as potassium and magnesium. These guavas are also particularly rich in anthocyanins and carotenoids, which in turn can be converted into vitamin A, an essential component for human health and growth.