👉 In the context of biochemistry and molecular biology, a pyrogenic substance is a substance that can be produced by an organism as a result of its metabolism. These substances are often associated with the immune response to pathogens or other harmful substances. For example, in the case of humans, a common pyrogenic substance is called "thyroid hormone," which is secreted by the thyroid gland and plays a crucial role in regulating various bodily functions including growth, metabolism, and hormone balance. When the