Inositol, often referred to as Vitamin B8 although it is not officially classified as a vitamin, is a naturally occurring carbohydrate compound that plays crucial roles in cellular signaling and lipid metabolism. It is structurally similar to glucose and is widely distributed in various foods and synthesized within the body. Inositol is integral to the function of cell membranes, where it helps regulate cell signaling pathways involved in neurotransmission, insulin sensitivity, and calcium ion regulation. Its presence supports mood regulation and mental health, serving as a precursor to important signaling molecules like phosphatidylinositol, which is essential for intracellular communication. Inositol also aids in the breakdown of fats and helps maintain healthy cholesterol levels. Due to its versatile roles in cellular function and mental well-being, inositol is studied for its potential therapeutic benefits in conditions such as anxiety disorders, depression, and metabolic syndrome. Its inclusion in dietary supplements underscores its importance in promoting overall health and neurological function.