Inhibitors are substances that slow down or prevent chemical reactions or biological processes. They can be found in various fields, including biochemistry and pharmacology. For example, in the human body, certain enzymes can be inhibited to control metabolic pathways, which can be crucial for maintaining health. In medicine, drugs often act as inhibitors to treat diseases. For instance, enzyme inhibitors can block specific enzymes involved in disease progression, such as those in cancer or viral infections. By inhibiting these enzymes, the drugs can help reduce symptoms or slow down the disease's advancement.