... in nature. D-limonene is a major constituent in several citrus oils (orange, lemon, mandarin, lime, and grapefruit). D-limonene is ... , ice cream, and pudding. Because D-limonene has a pleasant citrus fragrance, d-limonene is widely used as a flavor and ... is a variety of fruit (mainly citrus), natural ingredients are vegetables and spices. In the citrus fruits (especially in the skin), higher content ...