Pineapple fruit and pineapple juice have plenty of health benefits. Pineapples are rich in vitamins, proteins and essential minerals. At the same time, they are extremely low in terms of fat content. That makes this fruit an ideal low-calorie, yet filling food. Pineapple contains the protein digesting enzyme mixture called bromelain, it aids the process of digestion. Pineapples are also rich in Vitamin C which is a common antioxidant that protects the body from free radical damage and boosts the immune system.