What are vitamins?

Vitamins are classified as organic compounds that are essential for various physiological functions in the body. They are required in small amounts and do not provide calories, meaning they do not contribute to energy intake like macronutrients do. Each vitamin plays a unique role in supporting metabolism, promoting growth, and maintaining overall health.

Understanding the role of vitamins is crucial for maintaining health and preventing deficiencies, which can lead to various health issues. The distinction that vitamins are organic compounds also differentiates them from inorganic substances, as well as from macronutrients like carbohydrates, proteins, and fats that are required in larger quantities to provide energy and support physiological functions. Vitamins are essential for various body processes, including immune function, energy production, and tissue repair, but because they are needed in smaller quantities, they do not serve as a direct energy source.