Saturday, December 23, 2006
Friday, December 22, 2006
Monday, December 18, 2006
(site begins Jan.15,2007)A fat soluble vitamin, fat soluble vitamins can be toxic with excessive
ingestion because (A,D,E and K)"build up"in fat tissues and affect body chemistry in
a number of ways.However this discussion
should in no way be considered medical treatment
recommendation regarding any vitamin ,only informal science discussion . Vitamin E has been recently found in research to treat a number of neurological illnesses,many not mentioned
in this preliminary post .
| Chemical name | (2R)-2,5,7,8-Tetramethyl-2-[(4R,8R)-4,8,12 -trimethyltridecyl]-3,4-dihydro-2H-chromen-6-ol |
| Chemical formula | C29H50O2 |
| Molecular mass | 430.69 g/mol |
| CAS number | [59-02-9] |
| Density | 0.950 g/cm3 |
| Melting point | 2.5-3.5 °C |
| Boiling point | 200-220 °C at 0.1 mmHg |
| SMILES | CC(C)CCC[C@@H](C)CCC[C@@H](C)CCC [C@]1(C)CCc2c(C)c(O)c(C)c(C)c2O1 |
Tocopherol, or vitamin E, is a fat-soluble vitamin in eight forms that is an important antioxidant. Vitamin E is often used in skin creams and lotions because it is claimed by the manufacturers to play a role in encouraging skin healing and reducing scarring after injuries such as burns.
Natural vitamin E exists in eight different forms or isomers, four tocopherols and four tocotrienols. All isomers have a chromanol ring, with a hydroxyl group which can donate a hydrogen atom to reduce free radicals and a hydrophobic side chain which allows for penetration into biological membranes. There is an alpha, beta, gamma and delta form of both the tocopherols and tocotrienols, determined by the number of methyl groups on the chromanol ring. Each form has its own biological activity, the measure of potency or functional use in the body.
Vitamin E and Alzheimer's disease
Alzheimer's disease is a wasting disease of the brain. An observational trial conducted by The Johns Hopkins University Bloomberg School of Public Health found that when vitamin E is taken daily in large doses (400-1000IU) in combination with vitamin C (500-1000mg) the onset of Alzheimer's was reduced between 64 and 78%.[17]
[edit] Vitamin E and Parkinson's disease
In May 2005, The Lancet Neurology published a study suggesting that vitamin E may help protect against Parkinson's disease. Individuals with moderate to high intakes of dietary vitamin E were found to have a lower risk of Parkinson's. No conclusion was drawn about whether supplemental vitamin E has the same effect, however.[18]
Vitamin E and Age Related Macular Degeneration (AMD)
AMD is the leading cause of visual impairment and blindness in the United States and the developed world among people 65 years and older. Roughly 30% of the human population 75 years or older has some degree of AMD. As the average life span of humans continues to increase, particularly in the developed countries, the incidence of AMD is expected to nearly double within the next 25 years. What is particularly devastating about advanced forms of this condition is that it involves loss of central vision - affecting abilities to read and see faces. A randomized, placebo-controlled Age-Related Eye Disease Study (AREDS) trial sponsored by the National Eye Institutes showed that people at high risk of developing advanced stages of AMD lowered their risk by about 25 percent when treated for 5 years with a high-dose combination of vitamin C, vitamin E, beta-carotene, and zinc. Studies on vitamin E alone have been contradictory at best, with some showing no association between levels of vitamin E intake and progression of AMD
(site begins Jan.15,2007)
In foods, the most abundant sources of vitamin E are vegetable oils such as palm oil, sunflower, corn, soybean and olive oil. Nuts, sunflower seeds, seabuckthorn berries, and wheat germ are also good sources. Other sources of vitamin E are whole grains, fish, peanut butter, and green leafy vegetables. Fortified breakfast cereals are also an important source of vitamin E in the United States. Although originally extracted from wheat germ oil, most natural vitamin E supplements are now derived from vegetable oils, usually soybean oil.
The actual content of Vitamin E for rich sources is stated in the following list:[2]
- Wheat germ oil (215.4 mg/100 g)
- Sunflower oil (55.8 mg/100 g)
- Hazelnut (26.0 mg/100 g)
- Walnut oil (20.0 mg/100 g)
- Peanut oil (17.2 mg/100 g)
- Soybean oil (14.6 mg/100 g)
- Olive oil (12.0 mg/100 g)
- Peanut (9.0 mg/100 g)
- Pollard (2.4 mg/100 g)
- Corn (2.0 mg/100 g)
- Asparagus (1.5 mg/100 g)
- Oats (1.5 mg/100 g)
- Soybean (1.2 mg/100 g)
- Chestnut (1.2 mg/100 g)
- Coconut (1.0 mg/100 g)
- Tomatoes (0.9 mg/100 g)
- Carrots (0.6 mg/100 g)
