Polyamines are organic compounds that contain two or more amino groups. They play essential roles in cellular functions, including cell growth, differentiation, and gene expression. Common polyamines include putrescine, spermidine, and spermine, which are found in all living organisms. These compounds are involved in stabilizing DNA and RNA structures, as well as modulating enzyme activity. Polyamines are also linked to various biological processes, such as cell proliferation and stress response. Their levels can be influenced by factors like diet, age, and disease, making them important in both health and disease research.