Biologically active compounds are substances that have an effect on living organisms. These compounds can be found in various sources, including plants, animals, and microorganisms. They play crucial roles in biological processes, influencing functions such as growth, metabolism, and immune response. Examples include vitamins, hormones, and phytochemicals. Many medicinal plants contain biologically active compounds that are used in traditional and modern medicine. These compounds can help prevent or treat diseases by interacting with specific biological pathways. Research continues to explore their potential benefits, leading to the development of new pharmaceuticals and health supplements.