Natural Orange Peel OilFor Occasional, Mild Esophageal & Gastric DiscomfortSupports Phase I and II Detoxifying Enzyme SystemsDietary SupplementJarrow Formulas® d-Limonene provides relief of occasional, mild esophageal and stomach discomfort. As a triterpene lactone. d-Limonene also supports the liver's detoxifying Phase and Phase II enzyme systems. Jarrow Formulas® d-Limonene is steam-distilled from orange peel and purified. d-Limonene is the major constituent of citrus essential oils.