Bromelain is also known as pineapple enzyme. A thiol protease extracted from pineapple juice, skin, or the like. It preferentially hydrolyzes the peptide chain on the carboxyl side of basic amino acids or aromatic amino acids, selectively hydrolyzes fibrin, and can be used for beer clarification, medicinal digestion and anti-inflammatory swelling, and can inhibit heart attack and stroke caused by platelet aggregation. To relieve the symptoms of angina.