Polyenes are a class of organic compounds characterized by the presence of multiple conjugated double bonds. These compounds are often found in nature and can exhibit various biological activities. Common examples include carotenoids, which are pigments found in plants, and polyene antibiotics, such as nystatin and amphotericin B, used to treat fungal infections. The unique structure of polyenes allows them to interact with biological membranes, making them important in both natural processes and medical applications. Their ability to absorb light also contributes to their role in photosynthesis and other biochemical pathways, highlighting their significance in both ecology and health.