Nitrite compounds are chemical substances that contain the nitrite ion, NO2-. They are often formed from the oxidation of ammonia and are commonly found in fertilizers, food preservation, and some industrial processes. Nitrites can also occur naturally in soil and water as a result of microbial activity. In the food industry, nitrite compounds are used to cure meats, helping to prevent spoilage and enhance flavor. However, excessive consumption of nitrites can lead to health concerns, as they can form potentially harmful compounds in the body. Proper regulation and monitoring are essential to ensure safety in their use.