Vitamin is called a protective substance. Vitamins are essential micronutrients that play crucial roles in supporting overall health and protecting the body against various diseases and deficiencies. They act as antioxidants, immune boosters, and cofactors in enzymatic reactions, contributing to numerous physiological functions.

Vitamins help maintain healthy skin, vision, and bone health; support immune function; and participate in energy metabolism. Deficiencies in vitamins can lead to various health issues and increase susceptibility to infections and chronic diseases.

While proteins, carbohydrates, and fats primarily serve as energy sources and structural components in the body, vitamins are essential for regulating metabolism, supporting growth and development, and ensuring the proper functioning of organs and systems. Thus, vitamins are rightfully referred to as protective substances due to their critical roles in maintaining overall health and well-being.