Diet is a major factor in toxicology as it can be a source of both beneficial nutrients and harmful toxins. Consuming a balanced diet rich in fruits, vegetables, and whole grains can help the body detoxify by providing essential vitamins and minerals. However, certain foods may contain pesticides, heavy metals like mercury in fish, or naturally occurring toxins such as aflatoxins in peanuts. Understanding the source and preparation of food can significantly reduce exposure to these harmful substances.