Vitamins play essential roles in human health as necessary organic compounds that support various physiological functions. Each vitamin has specific functions, including acting as coenzymes in metabolic processes, supporting immune function, promoting cell and tissue health, and aiding in the absorption of other nutrients. Vitamins can be classified into two categories: water-soluble (e.g., B-complex vitamins and vitamin C) and fat-soluble (e.g., vitamins A, D, E, and K). Deficiencies or excesses of vitamins can lead to a range of health issues, underscoring the importance of maintaining a balanced diet rich in these essential nutrients.