is an extract derived from the stems of pineapples, although it exists in all parts of the fresh plant and fruit, which has many uses. The extract has a history of folk and modern medicinal use. As a supplement, it is thought to have anti-inflammatory effects. Bromelain also contains chemicals that might interfere with the growth of tumor cells and slow blood clotting, but no peer-reviewed research shows any efficacy against tumors. As a culinary ingredient, it is used primarily as a tenderizer.