Grapefruit (Citrus paradisi) has a fresh, citrusy aroma. Rich in the powerful antioxidant d-limonene, it is useful for maintaining skin health. Like many cold-pressed citrus oils, it is a popular oil to use in conjunction with weight-management programs. Grapefruit may also be used to enhance the flavor of food and water. Grapefruit has an approximate ORAC of 226,234 (TE/L). TE/L is expressed as micromole Trolox equivalent per liter.