Tag: constituents of food

The source of pyridoxine are cereals, meat and yeast.

Vitamin $D$ is required for the normal development of bones and teeth.
It regulates the adsorption of calcium and phosphate from intestine and promotes formation of bone.
It helps in deposition of calcium and phosphate in bones.

Vitamin $D$ is called calciferol or ergocalciferol. lt is a steroid hormone that has long been known for its important role in regulating body levels of calcium and phosphorus, and in mineralization of bone.
Vitamin $D$ in human body exist in two form :
(I) Vitamin $D _2$, also called as ergocalciferol.
(II) Vitamin $D _3$, also called as calciferol or cholecalciferol. 

Cyanocobalamin is rich in liver of pig. Cyanocobalamin is also called as vitamin $B _{12}$. It is used to prevent and treat low blood levels of this vitamin. It is important to maintain metabolism blood cells, and nerves. Some common sources of vitamin $B _{12}$ are liver, kidney, chicken, pork, beef, fish, eggs and dairy products.

The human body does not produce Vitamins. They have been produced as commodity chemicals and made widely available as inexpensive semisynthetic and synthetic-source multivitamin dietary and food supplements and additives

The non-protein component in enzymes, which is necessary for its biological activity, is called coenzyme. The activity of an enzyme depends, at the minimum, on a specific protein chain. In many cases, the enzyme consists of the protein and a combination of one or more non-protein parts called coenzymes. Coenzymes can be either inorganic or organic compounds. They include NADH, NADPH and ATP. These molecules transfer chemical groups between enzymes.

The vitamin essential for synthesis of lipids is biotin.
Biotin is required for carboxylase enzymes that are important in the metabolism of fatty acids and amino acids. Thus it acts like a coenzyme in the metabolism of fatty acids (types of molecules found in fats and oils).

The source of folic acid is spinach leaf. It is also found in asparagus, lettuce, chick peas, sprouts, beets, broccoli, corn, green peas, oranges, orange juice, legumes and green leafy vegetables.

Vitamins $B$ and $C$ are present in much smaller amounts in cells. These vitamins are micronutrients. These are required in very minute amounts. Together, they are extremely important for the normal functioning of the body. Their main function is to enable the many chemical reactions to occur in the body.

All vitamins are synthesized by plants. They cannot be synthesized by human beings. Hence, they must be supplied through diet.