Containing bromelain pineapple fruit , fiber, phytonutrients ( coumaric acid , chlorogenic acid ) , pectin , polysaccharides , potassium , magnesium , iron, folic acid , vitamin C , B5 , B6 , B1 , antioxidants and polyphenols ( beta-carotene ) . From the medical point of view , bromelain is the most precious compounds capable of accelerating the digestion of proteins .