This product contains a level of D-limonene that can pose a danger to human health, especially to children, if aspiration occurs. D-limonene is extracted from citrus fruit (such as orange peel), and is commonly used as an ingredient in cleaners and other household chemical products to provide a citrus smell. Aspiration occurs when the product is coughed up or vomited after being ingested. This coughing/vomiting causes small particles of the product to travel into the lungs and may result in severe health effects including pulmonary injury, chemical pneumonia or death.