Vitamin C, also known as ascorbic acid, L-ascorbic acid, dehydroascorbic acid, the antiscorbutic vitamin, L-xyloascorbic acid and L-threo-hex-2-uronic acidy-lactone, is a much talked about vitamin, with people claiming it as a cure-all for may diseases and problems - from cancer to the common cold. Yet, this miracle vitamin cannot be manufactured by the body, and needs to be ingested.

Vitamin C (Ascorbic Acid) is a very important essential nutrient, that is, we must obtain it from diet. It is found only in the fruit and vegetable foods and is highest in fresh, uncooked foods. Vitamin C is one of the least stable vitamins, and cooking can destroy much of this water-soluble vitamin from foods.

In recent years, the C of this much-publicized vitamin has also stood for controversy. With Linus Pauling and others claiming that vitamin C has the potential to prevent and treat the common cold, flus, and cancer, all of which plague our society, concern has arisen in the medical establishment about these claims and the megadose requirements needed to achieve the hoped-for results. Some studies suggest that these claims have some validity; however, there is more personal testimony from avid users of ascorbic acid than there is irrefutable evidence. There has also been some recent research that disproves the claims about treatment and prevention of colds and cancer with vitamin C. However, in most cases, studies showing vitamin C to be ineffective using lower dosages than Dr. Pauling recommended. Overall, vitamin C research is heavily weighted to the positive side for its use in the treatment of many conditions, including the common cold.

C also stands for citrus, where this vitamin is found. It could also stand for collagen, the protein "cement" that is formed with ascorbic acid as a required cofactor. Many foods contain vitamin C, and many important functions are mediated by it as well.

Vitamin C is required in the synthesis of collagen in connective tissue, neurotransmitters, steroid hormones, carnitine, conversion of cholesterol to bile acids and enhances iron bioavailability. Ascorbic acid is a great antioxidant and helps protect the body against pollutants. Because vitamin C is a biological reducing agent, it is also linked to prevention of degenerative diseases - such as cataracts, certain cancers and cardiovascular diseases.

Ascorbic acid also promotes healthy cell development, proper calcium absorption, normal tissue growth and repair, such as healing of wounds and burns. It assists in the prevention of blood clotting and bruising, and strengthening the walls of the capillaries. Vitamin C is needed for healthy gums, to help protect against infection, and assisting with clearing up infections and is thought to enhance the immune system and help reduce cholesterol levels, high blood pressure and preventing arteriosclerosis.

When there is a shortage of VITAMIN C, various problems can arise, although scurvy is the only disease clinically treated with vitamin C. However, a shortage of vitamin C may result in "pinpoint" hemorrhages under the skin and a tendency to bruise easily, poor wound healing, soft and spongy bleeding gums and loose teeth. Edema (water retention) also happens with a shortage of vitamin C, and weakness, a lack of energy, poor digestion, painful joints and bronchial infection and colds are also indicative of an under-supply.

Since ascorbic acid is a water-soluble vitamin, toxic levels are not built up or stored in the body, and any excess is lost mostly through urine. If extremely large amounts are taken gastrointestinal problems may appear, but will normalize when the intake is cut or reduced. To determine a level where a person might experience discomfort is difficult, since some people can easily stomach up to 25,000 mg per day, while others start having a problem at 600 or 1,000 mg. Some people using mega dose therapy of vitamin C may have side effects such as gastrointestinal complaints including diarrhea, nausea and abdominal cramps. These side effects normally stop as soon as high potency intake is reduced or stopped.

Good sources of vitamin C are green leafy vegetables, berries, citrus fruits, guavas, tomatoes, melons, papayas, etc.

Ongoing research is looking at the clinical use of vitamin C in the prevention and treatment of human diseases.