Calcium, a mineral vital to the human body, Calcium is necessary for many bodily functions, such as muscle contraction, and proper heart function.

Iron is vital in human nutrition as the adult human body contains 3-4 grams of iron. Haem-iron and non-haem iron are the two types of iron. Foods rich in haem-iron include meat, liver, fish, and poultry. Foods that are high in non-haem iron are those of vegetable origin, like green leafy vegetables, cereals, legumes, oilseeds, nuts, dry fruits and jiggery. Iron is vital for numerous body functions, including hemoglobin formation, brain development and function, muscle activity, regulation of body temperature and catecholamine. Deficiency of iron affects immune system, reduces the number of T-cells and production of antibodies. Iron is also necessary for binding oxygen to body cells as its main function is oxygen transport and cell respiration. It works as an anti-cancer agent. Iron increases energy level of the body, improving physical performance. It prevents insomnia.

Vitamin A is needed by the retina of the eye in the form of a specific metabolite(the light-absorbing molecule retinal). This molecule is absolutely necessary for both scotopic and color vision. It also palys an important role in the health or our skin, bone metabolism, immune function. It is also commercially produced and administered as esters such as retinyl acetate commonly called Vitamin A acetate. Its defeciency can cause blindness. Other problems include impaired immunity, hypokeratosis (white lumps at hair follicles), keratosis pilaris and squamous metaplasia of the epithelium lining the upper respiratory passages and urinary bladder to a keratinized epithelium.

Vitamin C or ascorbic acid, is also known as the antiscorbitic vitamin because it prevents the nutritional disease Scurvy. Its most active form is L-ascorbic acid and L-dehydroascorbic acid. Vitamin C is known for building up the body’s defenses against infection. However, there is more to this vitamin than just being an immunity-builder. It is essential to normal functioning of all cellular units including ribosomes and mitochondria. This is because it is a primary requirement in the formation and maintenance of the “binder” that holds cells as well as the cellular fluid inside. Furthermore, this water-soluble vitamin is necessary in the conversion of folic acid into its active form, folinic acid, necessary for the formation of red blood cells. It also speeds up wound and fracture healing, is involved in metabolism of some essential amino acids, plays a role in the production of steroid hormones for stress response and promotes the absorption of iron for the body to use. It is also an antioxidant vitamin that protects normal cells from the damage of oxidative free radicals.