Interleukin-1β (IL-1β) is a pro-inflammatory cytokine, a type of signaling molecule in the immune system. It plays a crucial role in the body's response to infection and injury by promoting inflammation, which helps to fight off pathogens and initiate healing processes. IL-1β is produced mainly by macrophages, a type of immune cell, and is involved in various physiological and pathological processes. Elevated levels of IL-1β are associated with several diseases, including rheumatoid arthritis, diabetes, and cardiovascular diseases. It acts by binding to specific receptors on target cells, triggering a cascade of immune responses. Understanding IL-1β's functions can help in developing treatments for inflammatory conditions and improving overall health.