Vitamins area unit essential for the conventional growth and development of a cellular organism. A victuals is associate chemical compound and an important nutrient, or micro-nutrient, that associate organism wants in little amounts .Vitamins area unit essential for the conventional growth and development of a cellular organism.
These nutrients facilitate the chemical reactions that manufacture among alternative things, skin, bone, and muscle.
If there is serious deficiency in one or more of these nutrients, a child may develop a deficiency disaease. Indeed, even minor insufficiencies may cause changeless harm.Once growth and development are completed, vitamins remain essential nutrients for the healthy maintenance of the cells, tissues, and organs that make up a multicellular organism; they also enable a multicellular life form to efficiently use chemical energy provided by food it eats, and to help process the proteins, carbohydrates, and fats required for cellular respiration.vitamin C is needed in the diet by humans and other primates, but not by many other animals.
Vitamin D is a needed micronutrient when its normal synthesis in the skin by sunlight is impaired by the lack of exposure to the sun.