News tagged with vitamin c

Vitamins can damage the body's own defences

Each year, we spend billion of dollars on dietary supplements. New research indicates that vitamin pills may upset the fragile balance in our cells and thus cause more harm than good.

Nov 26, 2013
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New research into optimising our levels of vitamin C

(Medical Xpress)—A daily vitamin C intake equivalent to eating two kiwifruit a day is required to ensure our muscles maintain optimal levels, researchers from the University of Otago, Christchurch have found.

Mar 04, 2013
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Vitamin C helps control gene activity in stem cells

Vitamin C affects whether genes are switched on or off inside mouse stem cells, and may thereby play a previously unknown and fundamental role in helping to guide normal development in mice, humans and other animals, a scientific ...

Jul 01, 2013
popularity 4.8 / 5 (4) | comments 0 | with audio podcast

Vitamin C supplements linked to kidney stones

New research from Karolinska Institutet in Sweden shows that men who take vitamin C supplements regularly run a higher risk of developing kidney stones. The study, which is published in the scientific periodical JAMA Internal Me ...

Feb 04, 2013
popularity 3.8 / 5 (4) | comments 2 | with audio podcast

Vitamin C may be beneficial for asthmatic children

Depending on the age of asthmatic children, on their exposure to molds or dampness in their bedroom, and on the severity of their asthma, vitamin C has greater or smaller beneficial effect against asthma, according to a study ...

Aug 30, 2011
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Vitamin C

Vitamin C or L-ascorbic acid is an essential nutrient for humans, a large number of higher primate species, a small number of other mammalian species (notably guinea pigs and bats), a few species of birds, and some fish.

Ascorbate (an ion of ascorbic acid) is required for a range of essential metabolic reactions in all animals and plants. It is made internally by almost all organisms, humans being a notable exception. Deficiency in this vitamin causes scurvy in humans. It is also widely used as a food additive.

The pharmacophore of vitamin C is the ascorbate ion. In living organisms, ascorbate is an anti-oxidant, since it protects the body against oxidative stress, and is a cofactor in several vital enzymatic reactions.

Scurvy has been known since ancient times. People in many parts of the world assumed it was caused by a lack of fresh plant foods. The British Navy started giving sailors lime juice to prevent scurvy in 1795. Ascorbic acid was finally isolated by 1933 and synthesized in 1934. The uses and recommended daily intake of vitamin C are matters of on-going debate. A recent meta-analysis of 68 reliable antioxidant supplementation experiments involving a total of 232,606 individuals concluded that consuming additional ascorbate from supplements may not be as beneficial as thought.

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