Each vitamin may refer to many vitamer compounds, they all show biological activity that is associated with particular vitamin. Vitamin has diverse biological function, function including hormones, antioxidants and mediators of cell regulators and signaling of tissue and cell growth as well as differentiation. Largest numbers of vitamins are functioning as precursor for the enzyme cofactor in bio-molecules that can help and act as substrates and catalysts in the metabolism.

Until 1900s, these vitamins were solely obtained through food intake; changes of diet can alter the types and amounts of the vitamins ingested.

Vitamins are helpful and essential for the development and normal growth of multicellular organism. Nutrients facilitate chemical reactions that can produce among other thins, bone, skin and muscles, if any serious deficiency is there, one or more of these nutrients,

child may develop deficiency disease. Vitamins are normally obtained with food, few of them are obtained by the means, microorganisms in intestine that is commonly know as “gut flora”, while form of D is synthesized in skin with help of natural ultraviolet wavelengths of sunlight. Once development and growth are completed, vitamin remain essential nutrients for healthy maintenance of cells, organs and tissues that can make up a multicellular organism and enable a multicellular life form to efficient energy use provide by the food it eats.