Uridine is a naturally occurring nucleoside that plays a crucial role in the synthesis of RNA, which is essential for various biological processes. It is composed of a ribose sugar and a uracil base, and it can be found in small amounts in certain foods, such as broccoli, tomatoes, and fish. In addition to its role in RNA production, uridine is involved in the metabolism of carbohydrates and lipids. Some studies suggest that it may have potential benefits for brain health and cognitive function, although more research is needed to fully understand its effects.