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- 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- Perhaps the most popular vitamin, L-ascorbic acid is viewed as an essential nutrient and is required to synthesize collagen in humans. The L-enantiomer of ascorbic acid, or Vitamin C for short, is the famous ingredient of oranges and other citrus fruits. It has been said that a glass of pure squeezed orange juice provides the daily requirement of Vitamin C. While the antioxidant function is deemed important, other biosynthetic functions are of vital significance. It provides an electron for eight different enzymes, besides the aforementioned synthesis of collagen; it aids the synthesis of carnitine and neurotransmitters, synthesis and catabolism of tyrosine and the metabolism of microsome. The additional function as a reducing agent, keeping iron and copper at bay is an additional trait.