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 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.

Vitamin A is used for improving poor night vision, dry skin, and it can help acne. It is also a fat soluble vitamin. Too much vitamin A can cause side effects. An excess of vitamin A can actually make acne worse.

Vitamin C is L-ascorbic acid, or the active component of Vitamin C. Ascorbate, which is an ion of the ascorbic acid, is required for many metabolic reactions and is manufactured internally by most organisms, except humans. It is an essential nutrient and needs to be provided through nutrition. While oranges were traditionally deemed a good source of Vitamin C, the amount provided by an orange is dwarfed by the amount provided by the kakadu plum the richest Vitamin C plant resource of the world. Other notable sources are red peppers, parsley, Kiwifruit, Guava, Broccoli, Camu Camu, rose hip, Jujube, papaya, strawberries, lemon, melon and similar. Vitamin C is essential for tyrosine, carnitine and collagen synthesis, is the most widely available antioxidant and furthermore is vital for blood vessels, cartilage and scar tissue.