The herb Rosemary has a number of components found to be beneficial. Rosmarinic acid, is a plant polyphenol derived from rosemary leaf. It is thought to have a number of health promoting effects. This extract helps maintain a variety of functions necessary for good immunity, such as sustaining normal basophil, cytokine, and eosinophil functions. It also helps support healthy liver function including phase I and II detoxification enzymes. Luteolin has been added to the extract, which also aids in the proper functioning of the immune system. This combination makes rosmarinic acid a unique product with worthwhile health benefits.