News tagged with vitamin
Scientists have just identified a new reason why some curry dishes, made with spices humans have used for thousands of years, might be good for you.
Medical research May 25, 2012 | 4.5 / 5 (13) | 2 |
Vitamin D slows the progression of cells from premalignant to malignant states, keeping their proliferation in check
(Medical Xpress)—A team of researchers at McGill University have discovered a molecular basis for the potential cancer preventive effects of vitamin D. The team, led by McGill professors John White and David Goltzman, of ...
Cancer Nov 23, 2012 | 4.7 / 5 (11) | 0 |
(Medical Xpress)—Despite spending billions of dollars on research and development, drug companies have been unable to come up with effective treatments for dementia and Alzheimer's Disease (AD). Now, A. ...
Neuroscience 9 hours ago | 4.9 / 5 (8) | 0 |
(HealthDay) -- Vitamin E may stimulate cells that result in bone loss, a new study suggests.
Medical research Mar 04, 2012 | 4.4 / 5 (7) | 2 |
A novel form of vitamin B3 found in milk in small quantities produces remarkable health benefits in mice when high doses are administered, according to a new study conducted by researchers at Weill Cornell Medical College ...
Medical research Jun 14, 2012 | 4.8 / 5 (6) | 0 |
For decades before antibiotics became generally available, sunshine was used to treat tuberculosis, with patients often being sent to Swiss clinics to soak up the sun's healing rays. Now, for the first time scientists have ...
Diseases, Conditions, Syndromes Sep 03, 2012 | 5 / 5 (5) | 0 |
Research from Boston University School of Medicine (BUSM) shows that improving vitamin D status by increasing its level in the blood could have a number of non-skeletal health benefits. The study, published online in PLOS ON ...
Immunology Mar 20, 2013 | 5 / 5 (5) | 0 |
A new study suggests that nicotinamide, more commonly known as vitamin B3, may be able to combat some of the antibiotic-resistance staph infections that are increasingly common around the world, have killed thousands and ...
Medical research Aug 27, 2012 | 4.8 / 5 (5) | 0 |
A team of academic researchers has identified the intracellular mechanisms regulated by vitamin D3 that may help the body clear the brain of amyloid beta, the main component of plaques associated with Alzheimer's ...
Alzheimer's disease & dementia Mar 06, 2012 | 5 / 5 (4) | 0 |
With every meal, immune cells in the intestine stand like sentries at a citadel, turning away harmful bacteria but allowing vitamins and nutrients to pass.
Immunology Mar 14, 2012 | 5 / 5 (4) | 0 |
In a striking, unexpected discovery, researchers at Albert Einstein College of Medicine of Yeshiva University have determined that vitamin C kills drug-resistant tuberculosis (TB) bacteria in laboratory culture. The finding ...
Diseases, Conditions, Syndromes 10 hours ago | 5 / 5 (4) | 0 |
(Medical Xpress) -- Aberdeen scientists have demonstrated for the first time a clear link between sunlight, vitamin D and an impact on regulatory cells in the immune system in findings that might provide new ...
Immunology Jul 18, 2012 | 4.8 / 5 (4) | 0 |
A new study suggests that there is a significant correlation between excessive daytime sleepiness and vitamin D, and race plays an important factor.
Health Dec 14, 2012 | 4.3 / 5 (4) | 1 |
Niacin, or vitamin B3, is the one approved drug that elevates "good" cholesterol (high density lipoprotein, HDL) while depressing "bad" cholesterol (low density lipoprotein , LDL), and has thereby attracted much attention ...
Medical research Apr 09, 2012 | 4 / 5 (4) | 0 |
Recent research by the University of Otago, Wellington has shown that giving brain cancer cells high dose vitamin C makes them much more susceptible to radiation therapy.
Cancer Feb 17, 2012 | 5 / 5 (3) | 0
A vitamin is an organic compound required as a nutrient in tiny amounts by an organism. A compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and the particular organism. For example, ascorbic acid functions as vitamin C for some animals but not others, and vitamins D and K are required in the human diet only in certain circumstances. The term vitamin does not include other essential nutrients such as dietary minerals, essential fatty acids, or essential amino acids, nor does it encompass the large number of other nutrients that promote health but are otherwise required less often.
Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" may refer to several vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals are grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A," which includes the compounds retinal, retinol, and many carotenoids. Vitamers are often inter-converted in the body.
Vitamins have diverse biochemical functions, including function as hormones (e.g. vitamin D), antioxidants (e.g. vitamin E), and mediators of cell signaling and regulators of cell and tissue growth and differentiation (e.g. vitamin A). The largest number of vitamins (e.g. B complex vitamins) function as precursors for enzyme cofactor bio-molecules (coenzymes), that help act as catalysts and substrates in metabolism. When acting as part of a catalyst, vitamins are bound to enzymes and are called prosthetic groups. For example, biotin is part of enzymes involved in making fatty acids. Vitamins also act as coenzymes to carry chemical groups between enzymes. For example, folic acid carries various forms of carbon group – methyl, formyl and methylene - in the cell. Although these roles in assisting enzyme reactions are vitamins' best-known function, the other vitamin functions are equally important.
Until the 1900s, vitamins were obtained solely through food intake, and changes in diet (which, for example, could occur during a particular growing season) can alter the types and amounts of vitamins ingested. Vitamins have been produced as commodity chemicals and made widely available as inexpensive pills for several decades, allowing supplementation of the dietary intake.
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