Wholesale Price Bulk Food Grade Pineapple Stem Extract Bromelain Powder 1200/2400 GDU Bromelain is a mixture of proteolytic (protein-digesting) enzymes found naturally in the pineapple plant (Ananas comosus). While it's in both the fruit and the stem, most supplements are made from the stem because it contains a higher concentration of the enzyme and is a byproduct of the food industry. Product Name Bromelain Powder CAS No. 9001-00-7 Active ingredient Bromelain Grade food