vitamin C


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a·scor·bic ac·id

(as-kōr'bik as'id),
A vitamin used in preventing scurvy, as a strong reducing agent, and as an antioxidant.
[G. a- priv. + Mod.L. scorbutus, scurvy, fr. Germanic]

vitamin C

vitamin C

vitamin C

A vitamin that promotes the growth, formation and maintenance of bones and teeth, the repair of tissues and blood vessels, and increases resistance to infections; it is ingested in the diet in citrus fruits, tomatoes and leafy green vegetables.

megavitamin therapy

The administration of excess or 'hyper-doses' of water-soluble vitamins, either physician-guided–eg, to treat neuropathies, or self-prescribed by health-food advocates. See Decavitamin, Orthomolecular medicine, Vitamin.
Megavitamins, adverse effects  
Thiamin CNS hyperresponsiveness–convulsions, Parkinson's disease–thiamin antagonizes l-dopa, sensory neuropathy–destruction of dorsal axon roots
Niacin/nicotinic acid & niacinamide/nicotinamide Exacerbation of asthma–histamine release, cardiac disease–arrhythmias, GI symptoms, eg nausea, vomiting, diarrhea, anorexia, DM–hyperglycemia, gout–↑ uric acid, liver disease–enzyme leakage, hepatocellular injury, portal fibrosis or massive necrosis, cholestatic jaundice, peptic ulcer disease–histamine release, ↑ acidity, skin disease
Vitamin B6 Paresthesia, headaches, asthenia, irritability
Vitamin C ↑ Iron absorption, possibly iron overload, evoking diarrhea, renal calculus formation and possibly inhibiting the bacteriolytic activity of neutrophils, G6PD deficiency–↑ red cell lysis, megaloblastic anemia–↓ vitamin B12 absorption, nephrolithiasis–oxaluria Diagn Clin Testing 1990; 28:27  

a·scor·bic ac·id

(ă-skōr'bik as'id)
Agent used in preventing scurvy, as a strong reducing agent, and as an antioxidant.
Synonym(s): vitamin C.
[G. a- priv. + Mod.L. scorbutus, scurvy, fr. Germanic]

vitamin C

see ASCORBIC ACID.

vitamin C,

n a water-soluble vitamin found in citrus fruits, cruciferous vegetables, leafy greens, peppers, and strawberries. Has been used to remedy deficiencies (including low levels caused by taking aspirin and birth control pills); to prevent and treat upper respiratory conditions; to prevent reflex sympathetic dystrophy, easy bruising, and skin aging; to treat high blood pressure and bedsores; and to improve behavior associated with autism. Caution in those prone to develop kidney stones, with kidney disease, excessive iron, deficient copper, or intestinal conditions and for patients taking warfarin and heparin. Caution is advised for children and pregnant or lactating women, for whom the maximum daily dose is 2000 mg. Also called
ascorbate.

a·scor·bic ac·id

(ă-skōr'bik as'id)
Vitamin used to prevent scurvy, as a strong reducing agent, and as an antioxidant.
Synonym(s): vitamin C.
[G. a- priv. + Mod.L. scorbutus, scurvy, fr. Germanic]

vitamin C

see ascorbic acid.

vitamin C C-responsive dermatosis
scaling and hair loss occur in calves and piglets fed diets low in vitamin C. Serum levels of the vitamin are low and recovery follows supplementation.

Patient discussion about vitamin C

Q. Why is vitamin C so important? As a kid my Mum always told me to take vitamin C every day. Is it really important and if so how to take a day?

A. Vitamin C is required for the growth and repair of tissues in all parts of your body. It is necessary to form collagen, an important protein used to make skin, scar tissue, tendons, ligaments, and blood vessels. Vitamin C is essential for the healing of wounds, and for the repair and maintenance of cartilage, bones, and teeth. Vitamin C is one of many antioxidants. Vitamin E and beta-carotene are two other well-known antioxidants. Antioxidants are nutrients that block some of the damage caused by free radicals, which are by-products that result when our bodies transform food into energy. The body does not manufacture vitamin C on its own, nor does it store it. It is therefore important to include plenty of vitamin C-containing foods in your daily diet. The recommended daily amounts are:
Men age 19 and older: 90 mg/day
Women age 19 year and older: 75 mg/day

Q. what is a Vitamin C and why is it so helpful and recommended? and where do i get lot's of it ??? :)

A. Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. Unlike most mammals, humans do not have the ability to make their own vitamin C. Therefore, we must obtain vitamin C through our diet.

Function

Vitamin C is required for the synthesis of collagen, an important structural component of blood vessels, tendons, ligaments, and bone. Vitamin C also plays an important role in the synthesis of the neurotransmitter, norepinephrine. Neurotransmitters are critical to brain function and are known to affect mood. For the full article: http://lpi.oregonstate.edu/infocenter/vitamins/vitaminC/ Hope this helps.

Q. Is the high intake of ascorbic acid helps to reduce weight, while dieting? Hi all…..I am 23, male. I have tried dieting to lose weight but in vain. Is the high intake of ascorbic acid helps to reduce weight, while dieting?

A. Ascorbic acid is actually vitamin C. It may not necessarily help you to drop the pounds, but a deficiency in vitamin C can cause weight gain because of a slowed metabolism. It is also needed for the growth and repair of tissues in all parts of your body, and too little can cause an increase in easy bruising and dry, scaly skin! It is essential for the healing of wounds, and for the repair and maintenance of cartilage, bones, and teeth. It is a good antioxidant, needed to block some of the damage caused by free radicals, which are by-products that results when our body transforms food into energy. Antioxidants also helps in reducing the damage to the body caused by toxic chemicals and pollutants such as cigarette smoke. The body does not manufacture vitamin C on its own, so it is important to include plenty of vitamin C-containing foods in your daily diet, or to take a vitamin C supplement.

More discussions about vitamin C
References in periodicals archive ?
Each received three weekly infusions of vitamin C over two months, followed by twice-weekly infusions for seven months, during which they continued to receive radiation and chemotherapy.
Age-dependent telomere shortening is slowed down by enrichment of intracellular vitamin C via suppression of oxidative stress.
Vitamin C has multiple effects on cellular functions in addition to its anti- or pro-oxidant functions, so it will be important to study the effects of high-dose vitamin C on normal and immune cells, points out Jihye Yun, a postdoctoral fellow in Cantley's lab.
The combination of isoniazid and vitamin C sterilized the M.
Additional marketers introducing antioxidant or vitamin-enriched color cosmeceutical products include Smashbox, with its Photo Finish Luminizing Foundation Primer To Go, which contains "a silky blend of vitamins and antioxidants;" Target's Sonia Kashuk line, with Super Sheer Shimmering Highlighting Liquid boasting "vitamin E and grapeseed oil to impart antioxidant and anti-aging properties;" Neutrogena, with its Healthy Skin Custom Glow Bronzer, formulated with a patented blend of antioxidants to help enhance skin's appearance over time; and Mary Kay, with its Cream Blush in Cranberry and Sheer Bliss shades, which are "infused with emollient white lily bulb extract plus peach extract that is rich in vitamin C and skin-protecting antioxidants.
Some experts believe that large amounts of vitamin C, an essential micronutrient found primarily in fruits and vegetables, could lower pressure as well, but randomized, controlled dietary intervention studies - the gold standard of nutrition research - have produced mixed results.
In chronically infected cells, vitamin C helped to reduce the levels of transcriptase, an enzyme crucial to virus reproduction by more than 99%.
She said that the Brigham and Women's Hospital study did not screen study participants for elevations in CRP, defined by the American Heart Association as 1 milligram per litre or greater, which is an important distinction in determining who might benefit from taking vitamin C.
Less well known is that vitamin C is a critical ingredient of collagen, a protein integral to skin, ligaments, tendons, blood vessels and scar tissue.
The review examined over 100 studies in more than 10 different medical specialties that evaluated vitamin C as both a stand-alone supplement and a nutrient used to enhance combination products.
Vitamin C is involved in the building and healing of joint and bone structures and it plays an active role in the immune response.
Despite Nobel laureate Linus Pauling's advocacy of vitamin C as a way for people to battle cancer, research has rarely found that doses of the nutrient affect the course of the disease.