Inosine is a nucleoside that consists of a purine base, specifically hypoxanthine, attached to a ribose sugar. It plays a crucial role in cellular metabolism and is involved in the synthesis of adenosine triphosphate (ATP), which is essential for energy transfer in cells. Inosine can be found in various foods and is also produced naturally in the body. Inosine is often studied for its potential health benefits, including its role in enhancing athletic performance and supporting brain health. Some research suggests that it may help improve recovery after exercise and reduce fatigue. However, more studies are needed to fully understand its effects and applications.