Pineapples' nutritional benefits are as fascinating as their anatomy. They boost our immune system, build strong bones and aid indigestion. Known to have high amounts of manganese, which is important for antioxidant defenses. Pineapples also contain high amounts of thiamin; a B vitamin that is involved in energy production. Due to the high amount of bromelain, pineapples can help reduce severe inflammation and can even reduce tumor growth.