Calcium, is a supple gray alkaline earth metal, which is the fifth most abundant element by mass in the Earth's crust. Calcium is also at the fifth most profuse dissolved ion in seawater by both molarities and mass. Calcium is a significant nutrient that we require in our bodies. It has many imperative functions. It helps getting strong teeth and bones and is involved in muscle contractions and blood clotting, The calcium is mainly stored in our teeth and bones. Low calcium level may lead to the bone fractures and in some cases porous bones or osteoporosis, generally in old age. The intake of calcium can drop down the high blood pressure, maintain your heart functions, avert gum disease, prevent colon and rectum cancer, and help blood to clot.

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- Otherwise known as retinol is the vitamin which helps the eyes to adjust to changes in light levels as well as keeping the eyes, skin and mucous membranes moist. Vitamin A enters the human diet mostly from animal foods, but as well as this some plant foods contain beta-carotene, which the body is then able to convert into Vitamin A. Retinol has antioxidant properties that help the body to repair tissue and cellular damage by neutralizing free radicals. Although there seems to be some evidence that retinol may help in cases of established artery disease the American Heart Association does not recommend it as a necessary supplement until there is more evidence.

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.