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Topic: Antioxidant

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  Antioxidant Vitamins
Antioxidant vitamins — E, C and beta carotene (a form of vitamin A) — have potential health-promoting properties.
Using dietary supplements of antioxidants to prevent cardiovascular disease should not be recommended until their effect is proved in clinical trials that directly test their impact on CVD end points. Beneficial effects must be demonstrated in well designed (randomized, placebo-controlled) clinical trials before recommending widespread use to prevent cardiovascular disease.
At this time, the scientific evidence supports a diet high in food sources of antioxidants and other heart-protecting nutrients, such as fruits, vegetables, whole grains and nuts instead of antioxidant supplements to reduce risk of CVD.
www.americanheart.org /presenter.jhtml?identifier=4452   (295 words)

  Antioxidants and Cancer Prevention: Fact Sheet - National Cancer Institute
Antioxidants are substances that may protect cells from the damage caused by unstable molecules known as free radicals.
Antioxidants are often described as "mopping up" free radicals, meaning they neutralize the electrical charge and prevent the free radical from taking electrons from other molecules.
Antioxidants are abundant in fruits and vegetables, as well as in other foods including nuts, grains and some meats, poultry and fish.
www.cancer.gov /cancertopics/factsheet/antioxidantsprevention   (1251 words)

 National Honey Board: Consumers: Honey and Antioxidants   (Site not responding. Last check: )
Antioxidant capacity of human serum samples was measured using a variety of methods including the oxygen radical absorbance capacity (ORAC) assay, ex vivo susceptibility of serum lipoprotein to Cu(2+)-induced oxidation, and the thiobarbituric acid reactive substances (TBARS) assay.
Antioxidant analysis of the different honey fractions suggested that the water-soluble fraction contained most of the antioxidant components, including protein; gluconic acid; ascorbic acid; hydroxymethylfuraldehyde; and the combined activities of the enzymes glucose oxidase, catalase and peroxidase.
Antioxidant capacity was measured by the oxygen radical absorbance capacity (ORAC) assay and by monitoring the formation of conjugated dienes as an index of the inhibition of copper-catalyzed serum lipoprotein oxidation.
www.honey.com /consumers/honeyhealth/nutritionresearch/antioxidants.asp   (1239 words)

 Antioxidant Activities of Flavonoids
Their dietary intake is quite high compared to other dietary antioxidants like vitamins C and E. The antioxidant activity of flavonoids depends on their molecular structure, and structural characteristics of certain flavonoids found in hops and beer confer surprisingly potent antioxidant activity exceeding that of red wine, tea, or soy.
Antioxidants are compounds that protect cells against the damaging effects of reactive oxygen species, such as singlet oxygen, superoxide, peroxyl radicals, hydroxyl radicals and peroxynitrite.
The antioxidant properties of the prenylflavonoids were compared to those of quercetin (a flavonol), genistein (the major isoflavone in soy), chalconaringenin (a non-prenylated chalcone), naringenin (a non-prenylated flavanone), and vitamin E. The possible interaction of xanthohumol, the major prenylchalcone in beer, with vitamin E to inhibit LDL oxidation induced by copper was also examined.
lpi.oregonstate.edu /f-w00/flavonoid.html   (1099 words)

 CoffeeScience.org - Antioxidant Content
A progressive decrease in antioxidant activity (associated mainly with chlorogenic acids in the green beans) with degree of roasting was observed with the simultaneous generation of high (HMM) and low molecular mass (LMM) compounds possessing antioxidant activity.
Maximum antioxidant activity was observed for the medium-roasted coffee; the dark coffee had a lower antioxidant activity despite the increase in color.
Under these standard cup serving conditions, the antioxidant activity as determined by the lag time was in the range of 292-948 min for coffee, 217-444 min for cocoa, 186-338 min for green tea, 67-277 min for fl tea, and 6-78 min for herbal tea.
www.coffeescience.org /antioxidant   (919 words)

 Antioxidant Summary
Antioxidants are molecules that prevent or slow down the breakdown of other substances by oxygen.
Antioxidants are chemical compounds that combat oxidants or oxidizing agents.
An antioxidant is a chemical that reduces the rate of particular oxidation reactions in a specific context, where oxidation reactions are chemical reactions that involve the transfer of electrons from a substance to an oxidising agent.
www.bookrags.com /Antioxidant   (231 words)

 vitacost.com - Science & Research - Antioxidants
Antioxidants are a class of nutrients which help the body to repair free radical damage.
Antioxidants are able to neutralize free radicals in the body.
However, each time an antioxidant molecule interacts with an antioxidant, it also is neutralized; thus, a constant replenishing of antioxidants in the system is necessary.
www.vitacost.com /science/nutrients/antioxidants.html   (300 words)

 AntiOxidants, AntiOxidant Supplement, AntiOxidant Vitamins
The AntiOxidant power of sage, mace and fl pepper were reported some 60 years ago, when these herbs were used to additionally protect frozen meat.
Several studies conducted by researchers in Malaysia discovered that Longjack is rich in Superoxide Dimutase, a kind of AntiOxidant enzyme that has the ability to inhibit the chain reaction of free radicals are harmful in the body and result in aging.
Researchers writing in the Proceedings of the National Academy of Sciences reported that the antioxidant supplementation could stem the progress of retinitis pigmentosa, a group of eye diseases that entail the death of rods and cones and can eventually lead to vision loss.
www.herbal-powers.com /antioxidants.html   (1143 words)

 Highbeam Encyclopedia - Search Results for Antioxidant
antioxidant nutrients Highly reactive oxygen radicals are formed during normal oxidative metabolism and in response to infection and some chemicals.
Synthetic and natural antioxidants are used to slow the deterioration of gasoline and rubber, and such antioxidants as vitamin C (ascorbic acid), butylated hydroxytoluene (BHT), and butylated hydroxyanisole (BHA) are...
Antioxidants can improve product quality; antioxidants can offer protection from a number of factors working against the shelf life of your products.
www.encyclopedia.com /SearchResults.aspx?Q=Antioxidant   (665 words)

 The antioxidant myth: a medical fairy tale - health - 05 August 2006 - New Scientist   (Site not responding. Last check: )
The best known antioxidants are vitamin E (also known by its chemical name tocopherol), vitamin C, and two broad classes of plant chemicals called polyphenols (including flavonoids) and carotenoids (including beta carotene and lycopene).
While polyphenols act as antioxidants in the test tube, it is not clear that they are absorbed into the bloodstream, and if they are, they are swiftly metabolised.
Among the leading sources of dietary antioxidants are tea and coffee, and there is some evidence that green tea in particular is linked with health benefits including reduced risk of cancer and cardiovascular disease.
www.newscientist.com /article/mg19125631.500   (2435 words)

Antioxidants in biological systems have multiple purposes, including defending against oxidative damage and participating in the major signaling pathways of the cells.
Antioxidants are widely used as ingredients in dietary supplements that are used for health purposes such as preventing cancer and heart disease.
Vitamin C is a basic antioxidant and is essential in the synthesis of collagen and the health of connective tissue, gums, teeth and bones.
www.herbs-wholesale.com /Antioxidant/309/1/Antioxidant.htm   (693 words)

 Lycopene: An Antioxidant For Good Health
Antioxidants work by neutralizing free radicals that are formed when body cells burn oxygen for energy.
Antioxidants also may help keep the immune system healthy and reduce the risk for cancer and other diseases.
In a recently published study, men who had the highest amount of lycopene in their body fat were half as likely to suffer a heart attack as those with the least amount of lycopene in their body fat.
www.eatright.org /cps/rde/xchg/SID-5303FFEA-A120B9BE/ada/hs.xsl/nutrition_5328_ENU_HTML.htm   (593 words)

Typically this means that the antioxidant molecule becomes a free radical in the process of neutralizing a free radical molecule to a non-free-radical molecule.
The antioxidant molecule may be very large (allowing it to "dilute" the unpaired electron), it may be readily neutralized by another antioxidant and/or it may have another mechanism for terminating its free radical condition.
Antioxidants are notable for boosting the immune system because immune system cells in the bloodstream are so easily accessed by free radicals as well as by antioxidants.
www.benbest.com /nutrceut/AntiOxidants.html   (4086 words)

 Herb Blurb: Antioxidants
No one is immune to oxidative damage, but antioxidants can help slow down or prevent the oxidation process, and thus help prevent or repair damage done to your body's cells by oxygen.
Epidemiological studies suggested that high blood concentrations of antioxidant vitamins or dietary intake of antioxidants could protect against cancer and cardiovascular disease.
Also, there are lab studies that show that antioxidants enhance the standard cancer treatment of radiation and chemotherapy.
healthlink.mcw.edu /article/964714624.html   (488 words)

 Antioxidant supplement with a natural antioxidant herb and antioxidant vitamin
Instrumental in slowing the aging process and boosting the immune system's ability to fight disease, there are literally thousands of known antioxidant vitamins found in nature, but only a relative few play significant roles in our bodies as antioxidants that have antiaging properties.
This antioxidant formula has been formulated from whole herbs with NO chemical process or solvents used to extract (using chemicals) from the original herb or plant.
Increases antioxidant protection: by recycling vitamins C and E and CoQ10.
www.naturallydirect.net /antioxidant-supplement.htm   (1329 words)

Antioxidants protect our bodies from free radicals that can damage DNA and therefore cause our cells to reproduce improperly which can lead to any number of diseases including coronary heart disease, cancer, premature aging, inflammatory diseases, Parkinson's, periodontal disease, and cataracts.
Antioxidants are found in fruits and vegetables rich in Vitamin C, Selenium, and Beta Carotene.
Antioxidants can be found in colorful fruits and vegetables because that is what makes them those colors.
www.deliciousorganics.com /Controversies/antioxidants.htm   (1167 words)

 Antioxidant Supplement : Product Line
Antioxidants are substances that remove free radicals by interacting with them chemically, usually by donating an electron to stabilize the free radical (3).
Antioxidants from dietary sources include tocopherols; ascorbic acid; vitamin A, or its precursor beta carotene; and many plant-derived compounds (phytochemicals such as carotenoids bioflavonoids, and flavonoids).
A multiple antioxidant nutrient intervention may be more likely to protect against elevated oxidative stress than intervention with a single nutrient because of cooperative interaction of antioxidant nutrients (4,5).
www.vitaganza.com /pages/antioxidant-supplement.htm   (201 words)

 Rooibos Tea: Research into Antioxidant and Antimutagenic Properties
Antioxidants are hot topics in the health news these days, and an herbal tea called rooibos (pronounced ROY-boss) is becoming popular partly because it is being marketed as a healthy beverage with high levels of antioxidants.
To assess the antioxidant capability of rooibos tea as a whole, researchers compared the antioxidant activity of rooibos tea extracts to that of green and fl tea extracts with the DPPH radical scavenging assay as well as the beta-carotene bleaching method.
She says that researchers need to determine which of the antioxidant substances in rooibos tea are absorbed by the body and how much tea is needed to produce a measurable benefit.
www.herbalgram.org /herbalgram/articleview.asp?a=2550   (7525 words)

 wcbstv.com - Study: No Antioxidant Vitamin Long-Life Benefit
Antioxidant supplements have been tested repeatedly by many clinical trials with no consistent clear evidence for their health effects, Gluud said.
Preliminary studies suggested antioxidants might block the heart-damaging effects of oxygen on arteries and the cell damage that might encourage some kinds of cancer.
But some researchers now believe antioxidants work only when they are in food, or that people who eat vitamin-rich food are healthier simply because they take better care of themselves.
wcbstv.com /consumer/consumer_story_058123853.html   (915 words)

 Antioxidant - Antioxidant food Protects Body Cells from Damage
Antioxidants are an important supplement to anyone's diet because they prevent the bodily damage caused by free radicals.
Antioxidants prevent injury to blood vessel membranes, helping to optimize blood flow to the heart and brain, defend against cancer-causing DNA damage, and help lower the risk of cardiovascular disease and dementia, including Alzheimer's disease.
Antioxidants vitamins such as vitamin E act to protect your cells against the effects of free radicals, which are potentially damaging by-products of the body's metabolism.
www.herbs-wholesale.com /article/antioxidant.asp   (1002 words)

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