Iron is one of the most commonly available chemical elements which are used in the form of metal. When in the presence of oxygen and moisture, iron gets oxidized very easily. Therefore it is never available on the surface of earth. Iron is a metal whose properties can be changed by mixing it with the various other metals. Humans need iron as a daily dietary substance. There are a number of supplements available in market which provides the daily required dose of iron. But the best way to consume iron is by eating the food that is rich in iron. Fish, poultry, beans, lentils, leafy vegetables are some of food items that are a good source of iron. Although, research shows that it is easier to digest the iron found in meat and meat products than the vegetables.

Magnesium is essential to all living cells and is a vital component to a healthy diet. Calcium absorption for the body largely depends on magnesium to facilitate this.

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, also known as Ascorbic Acid, is water soluble vitamin. It is water soluble that leaves the body through urine. It plays an important role in the growth and repair of tissues in the body. It also important in the formation of collagen, a protein used by the body to make ligaments, blood vessel, scar tissue, and skin. It helps prevent osteoporosis and osteoarthritis. Vitamin C is an antioxidant that fights and prevents free radicals from damaging the cells that may result in premature aging, heart problems and cancer. Vitamin C also shortens the duration of colds and promotes quick recovery because it boosts the immune system. It also helps control blood pressure.