Toxicants are substances that can cause harm to organisms upon exposure. They can be naturally occurring or synthetic. The nature of toxicants is defined by their chemical structure, concentration, and the way they interact with biological systems. Chemical structure plays a critical role in determining the reactivity and potential toxicity of a substance. Some toxicants are lipophilic, allowing them to accumulate in fatty tissues, while others are hydrophilic and are more readily excreted from the body.
