Bromelain, a proteolytic enzyme found in pineapples, aids in the breakdown of protein molecules in the body. Lovneet Batra, a well-known nutritionist in Delhi-NCR, adds: "Bromelain aids in protein digestion and utilization, allowing you to acquire lean body mass. It also aids in the mobilization of abdominal fat." Eating a whole pineapple will not make you gain weight - even if you do not use its core! The pineapple is one of the most nutritious fruits available and it's delicious too. It contains many vitamins and minerals that help keep you healthy, and eating one can never do any harm. Pineapple has more than 80 different nutrients including vitamin C, fiber, calcium, and iron. It also contains bromelain, which helps break down proteins by stimulating enzymes in your stomach.