- According to the studies, one cup of pineapple (165 g) contains 88 % of the daily value for vitamin C and 73 % of the daily value for manganese. Manganese is an antioxidant that aids in metabolism and blood sugar management. Pineapple also includes a variety of polyphenolic chemicals that are anti-inflammatory and antioxidant. In addition, pineapple contains bromelain, an enzyme that is widely used to tenderize meats. Although there is a minimal study on this, anecdotal sources say that this enzyme aids digestion.