vitamin E


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to vitamin E: vitamin K, vitamin D

vitamin E

[′vīd·ə·mən ¦ē]
(biochemistry)
Any of a series of eight related compounds called tocopherols, α-tocopherol having the highest biological activity; occurs in wheat germ and other naturally occurring oils and is believed to be needed in certain human physiological processes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In a new study, researchers showed in prostate cancer cells that one form of vitamin E inhibits the activation of an enzyme that is essential for cancer cell survival.
Vitamin E, because it's a lipid-soluble antioxidant, easily penetrates into the vital membranes of the skin cells and accumulates there to protect against the damaging effects of lipid peroxidation.2 Both tocotrienols and tocopherols can freely donate a hydrogen atom (a proton plus electron) from the hydroxyl group on their chromanol ring.
"Given that more than 50% of individuals 60 years or older are taking supplements containing vitamin E and that 23% of them are taking at least 400 IU per day despite a recommended daily dietary allowance of only 22.4 IU for adult men, the implications of our observations are substantial," said Dr.
These included 113 in the placebo group, 147 in the vitamin E group, 143 in the selenium group, and 118 in the combined therapy group.
Experimental rations were including; Group 1: supplementation 2% of semi-refined sunflower oil with 75 mg Vitamin E, Group 2: supplementation 2% of semi-refined sunflower oil with 150 mg Vitamin E, Group 3: supplementation 4% of semi-refined sunflower oil with 75 mg Vitamin E, Group 4: supplementation 4% of semi-refined sunflower oil with 150 mg Vitamin E, Group 5: supplementation 6% of semi-refined sunflower oil with 75 mg Vitamin E, and Group 6: supplementation 2% of semi-refined sunflower oil with 150 mg Vitamin E [table1].
In contrast, unprocessed oils are rich in vitamin E's, especially tropical oils such as coconut and macadamia nut, which protect the plants' progeny from effects of the tropical heat.
Like quercetin, vitamin E is an antioxidant that protects neuronal membranes from lipid-peroxidation.
Yet, a study published last year that looked at 980 older New York City residents found no link between AD and high intakes of vitamin E from food or supplements.
The Shutes were cardiovascular specialists and arguably the major proponents of vitamin E use in the late 1940s.
In a year-and-a-half human trial, patients on Cisplatin, who also took 300 IU of vitamin E a day right before their chemo and continued taking it for three months after their treatments ended, had less nerve damage than those on Cisplatin alone.
Vitamin E is a dietary supplement that boosts turkeys' immune response.
Like selenium, vitamin E's link with the prostate showed up in a clinical trial designed to test something else.