Socrates Said," Let foods be your medicine and let medicine be your foods". Let us all practice the values of the past wisdom to build a letter living and living health while we enjoy the delicious drinks

Thursday, June 15, 2017

All About Vitamins: The importance of vitamin A

Kyle J. Norton(Scholar, Master of Nutrients), all right reserved.
Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.
Vitamins are organic compounds and vital nutrients needed by your body to grow and develop in a profound way.
Vitamin A
Vitamin A, a bi-polar molecule formed by bonds between carbon and hydrogen, is a fat soluble vitamin which can not be stored in the liver but it can be converted from beta-carotene, a powerful antioxidant. The vitamin is best known fir its strong effects in improving vision and enhancing bone growth.

According to Dr. Dawson, 
1. Vitamin A (all-trans-retinol and its esters) and provitamin A (beta-carotene) are essential dietary nutrients that provide a source of retinol. Both retinyl esters and beta-carotene are metabolized to retinol.
2.  Oxidation of retinol provides retinal, which is essential for vision, and retinoic acid, a transcription factor ligand that has important roles in regulating genes involved in cell morphogenesis, differentiation, and proliferation.
3. Vitamin A can produce cell and tissue changes similar to those found during neoplastic transformation and that vitamin supplementation can reverse this process indicated a potential role for vitamin A in cancer prevention.
4. Serving as a metabolic source of retinol, beta-carotene, along with other dietary carotenoids, function as antioxidants that can prevent carcinogenesis by decreasing the levels of the free-radicals that cause DNA damage.
5. But, in populations deficient in vitamin A (caused by an inadequate diet or tobacco use), supplementation programs appear to be effective in reducing cancer incidence. In groups already having sufficient dietary or supplemental vitamin A, cancer prevention by added vitamin A may not be particularly effective. Supplementation at higher doses causes toxicity.

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Sources
The importance of vitamin A in nutrition, by Dawson MI1.

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