Friday, July 31, 2009

ViTAmIn C- a vitamin abundant in citrus fruits

Vitamin C? What does it remind you of?? It reminds me of a vitamin found in large amounts in citrus fruits like orange, grapefruit and lemon and beverages like orange juice and lemon juice.

When I say vitamin C, there some who are still bemused. What is a vitamin? Quite a good question, though. Vitamin is a substance that cannot be synthesized in the body, but important for metabolism. Metabolism is the rate of burning fats in the human body. Vitamin is also defined as a chemical that is an important part of food other than carbohydrates, fats, proteins and mineral salts.
Without vitamins, many deficiency diseases can be caused. Animals that need Vitamin D must manufacture it from ergosterol in the presence of UV (ultraviolet) light. This vitamin manufacturing mechanism is not well understood by scientists. Some animals cannot synthesize their own vitamins, and some cannot.

Vitamin D is vital to synthesize other vitamins. Humans cannot produce their own vitamins as they cannot manufacture Vitamin D. Human beings only obtain Vitamin D from direct exposure to sunlight. Humans can only get vitamins through the daily intake of food.

Besides metabolism, vitamins are important to control or regulate bodily processes that take place in the human body. Now! Enough about vitamins. Let's enumerate about Vitamic C.
Vitamin C or better known as ascorbic acid is a water-soluble vitamin. It is an enolic form of 3-oxo-L-gulofuranolactone. It can be produced by the synthesis of glucose and plant extracts like rose hips, blackcurrants, or citrus fruits.

Vitamin C easily performs oxidation in air. Vitamin C can be found in broccoli, cauliflower, mangetout, cabbage, brussel sprouts, green leafy vegetables, chillies, red peppers, parsley, watercress, strawberries, kiwi fruits, citrus fruits, and guavas.

In alkaline solutions, ascorbic acid can be ut
ilized as a photographic developing agent. Ascorbic acid is also important to heal wounds and formation of bone and teeth, collagen (fibrous protein, an important structural component of bone, cartilage, tendon and other connective tissues) and intercellular material.

This vitamin also improves resistance to infections, helps in the absorption of iron into the body and retains skin elasticity. Vitamic C is al
so essential to prevent cancer and can be used to treat scurvy (spongy and bleeding gums and bleeding under the skin caused by the deficiency of ascorbic acid).

Ascorbic acid can also synthesize neurotransmitter, nore
pinephrine. A neurotransmitter can affect mood, important for brain function and help neurons move through synapse. Vitamin C is required in the synthesis of carnitine, an important molecule to transport fats to the mitochondria organelle of a cell to convert fats into energy.

An recent research on Vitamin C was done and proved that Vitamin C helps cholesterol metabolizes to bile acids which affect blood cholesterol levels
in the body and formation of gallstones.

There are still more about Vitamin C. Vitamin C does help us in many ways. It is also known that Vitamin C is an effective antioxidant and it can protect indispensable molecules like proteins, carbohydrates, nucleic acids (DNA and RNA) and lipids from being damaged by free radicals and reactive oxygen species. Vitamin C can also regenerate Vitamin E, another antioxidant.

Attached below is the recommended dietary allowance (RDA) for Vitamin C. The table explains about the amount of vitamin C that must be consumed by which age group and which gender. In a nutshell, Vitamin C is indeed vital for the human body and we should consume in the form of foods, juices, tablets and other available food sources. Vitamin C is also important in reducing cold and increasing the strength of our immune system. So, if you do not want morning colds, TAKE VITAMIN C!!!!



Recommended Dietary Allowance (RDA) for Vitamin C
Life Stage Age Males (mg/day) Females (mg/day)
Infants 0-6 months 40 (AI) 40 (AI)
Infants 7-12 months 50 (AI) 50 (AI)
Children 1-3 years 15 15
Children 4-8 years 25 25
Children 9-13 years 45 45
Adolescents 14-18 years 75 65
Adults 19 years and older 90 75
Smokers 19 years and older 125 110
Pregnancy 18 years and younger - 80
Pregnancy 19-years and older - 85
Breastfeeding 18 years and younger - 115
Breastfeeding 19 years and older - 120

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