Why is Beta Carotene So Good For Your Eyes?
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Darrell Miller
Apr 1, 2013, 8:40:03 PM4/1/13
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Darrell Miller
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Article Title: Why is Beta Carotene So Good For Your Eyes?
Author: Darrell Miller
Word Count: 524
Article URL: http://www.isnare.com/?aid=719825&ca=Wellness%2C+Fitness+and+Diet
Format: 64cpl
Contact The Author: http://www.isnare.com/eta.php?aid=719825
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Beta � carotene is an antioxidant of the group of naturally occuring chemicals termed as carotenes or carotenoids. Carotenes are the chemicals that give various fruits and vegetables an orange or red to yellow color. These fruits and vegetables include carrots, pumpkins, sweet potatoes and the like. The word �carotene� was first created in the early 19th century after a scientist experimented to crystallize this substance from the roots of carrots. Carotenes are found to have a promising antioxidant property.
Inside the body, beta � carotene is metabolized and converted to vitamin A, a fat- soluble vitamin responsible for maintaining the health of your skin and eyes. Like beta-carotene, alpha � carotene and gamma � carotene can also be converted to an activated vitamin A after it is metabolized. Among these three compounds, beta�carotene is considered to be the most well � known provitamin A. The absorption area of carotenes is in the small intestines by way of passive diffusion. During this process, a molecule of beta�carotene is cleaved with the aid of an enzyme into two molecules of vitamin A. However, scientists found that the success rate of beta � carotene absorption is only about 10 � 25%.
So, why is beta � carotene so good for our eyes? Our eyes adjust to light variations by depending on visual purple or precisely known as rhodopsin. Rhodopsin is formed from an aldehyde form of vitamin A called retinal or retinaldehyde. It is then bound to opsin, which is a protein. The combination of retinal and opsin is stored in photoreceptors of the retina termed as rods and cones. A transient excitatory process of electrical energy is initiated when light strikes the rods and cones. The impulse travels along the optic nerve going to the occipital cortex in the brain. The impulse is then processed and perceived as vision. Without enough vitamin A, rhodopsin cannot be formed and and the retina will not be able to readily respond and accommodate to light changes. As a result, night blindness or poor adaptation to vision in low light areas may develop.
Great dietary sources of beta � carotene include dark green leafy vegetables and orange or yellow fruits and vegetables. Nutritionists say that five servings of any of these fruits and vegetables everyday can provide six to eight milligrams of beta � carotene. The recommended dietary intake of beta � carotene is only two to four micrograms so that normal levels of vitamin A is maintained. And since beta � carotene is fat soluble, a little amount of dietary fat is needed for an efficient absorption. Therefore, vitamin A can be stored and cannot be readily excreted.
Beta � carotene supplements are either produced synthetically or extracted from palm oil, algae and fungi. This supplement is extremely safe. However, a more concentrated urine and a yellowish skin may be observed with high doses of beta � carotene, these side effects easily subside if the dosage of beta � carotene is lowered.
Look for beta-carotene at your local or internet vitamin store in softgel form. Always choose name brands like Solaray to ensure quality and purity of what you by for better health.
About The Author: If you don�t eat enough vegetables, add Food beta carotene to your diet risk free at VitaNet �, LLC Vitamin Store. http://vitanetonline.com/ Unique content such as this is available to all who are interested contact me: http://vitanetonline.com/articlerequest.cfm
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=719825
*********************** ARTICLE END ***********************
- To distribute your articles go to http://www.isnare.com/distribution.php
- For more free-reprint articles go to http://www.isnare.com
Message delivered directly to members of the group:
publish-the...@googlegroups.com
*****************************************************************
Please consider this free-reprint article written by:
Darrell Miller
*****************************
IMPORTANT - Publication/Reprint Terms
- You have permission to publish this article electronically in free-only publications such as a website or an ezine as long as the bylines are included.
- You are not allowed to use this article for commercial purposes. The article should only be reprinted in a publicly accessible website and not in a members-only commercial site.
- You are not allowed to post/reprint this article in any sites/publications that contains or supports hate, violence, porn and warez or any indecent and illegal sites/publications.
- You are not allowed to use this article in UCE (Unsolicited Commercial Email) or SPAM. This article MUST be distributed in an opt-in email list only.
- If you distribute this article in an ezine or newsletter, we ask that you send a copy of the newsletter or ezine that contains the article to http://www.isnare.com/eta.php?aid=719825
- If you post this article in a website/forum/blog, ALL links MUST be set to hyperlinks and we ask that you send a copy of the URL where the article is posted to http://www.isnare.com/eta.php?aid=719825
- We request that you ask permission from the author if you want to publish this article in print.
The role of iSnare.com is only to distribute this article as part of its Article Distribution feature ( http://www.isnare.com/distribution.php ). iSnare.com does NOT own this article, please respect the author's copyright and this publication/reprint terms. If you do not agree to any of these terms, please do not reprint or publish this article.
*****************************
Article Title: Why is Beta Carotene So Good For Your Eyes?
Author: Darrell Miller
Word Count: 524
Article URL: http://www.isnare.com/?aid=719825&ca=Wellness%2C+Fitness+and+Diet
Format: 64cpl
Contact The Author: http://www.isnare.com/eta.php?aid=719825
Easy Publish Tool: http://www.isnare.com/html.php?aid=719825
*********************** ARTICLE START ***********************
Beta � carotene is an antioxidant of the group of naturally occuring chemicals termed as carotenes or carotenoids. Carotenes are the chemicals that give various fruits and vegetables an orange or red to yellow color. These fruits and vegetables include carrots, pumpkins, sweet potatoes and the like. The word �carotene� was first created in the early 19th century after a scientist experimented to crystallize this substance from the roots of carrots. Carotenes are found to have a promising antioxidant property.
Inside the body, beta � carotene is metabolized and converted to vitamin A, a fat- soluble vitamin responsible for maintaining the health of your skin and eyes. Like beta-carotene, alpha � carotene and gamma � carotene can also be converted to an activated vitamin A after it is metabolized. Among these three compounds, beta�carotene is considered to be the most well � known provitamin A. The absorption area of carotenes is in the small intestines by way of passive diffusion. During this process, a molecule of beta�carotene is cleaved with the aid of an enzyme into two molecules of vitamin A. However, scientists found that the success rate of beta � carotene absorption is only about 10 � 25%.
So, why is beta � carotene so good for our eyes? Our eyes adjust to light variations by depending on visual purple or precisely known as rhodopsin. Rhodopsin is formed from an aldehyde form of vitamin A called retinal or retinaldehyde. It is then bound to opsin, which is a protein. The combination of retinal and opsin is stored in photoreceptors of the retina termed as rods and cones. A transient excitatory process of electrical energy is initiated when light strikes the rods and cones. The impulse travels along the optic nerve going to the occipital cortex in the brain. The impulse is then processed and perceived as vision. Without enough vitamin A, rhodopsin cannot be formed and and the retina will not be able to readily respond and accommodate to light changes. As a result, night blindness or poor adaptation to vision in low light areas may develop.
Great dietary sources of beta � carotene include dark green leafy vegetables and orange or yellow fruits and vegetables. Nutritionists say that five servings of any of these fruits and vegetables everyday can provide six to eight milligrams of beta � carotene. The recommended dietary intake of beta � carotene is only two to four micrograms so that normal levels of vitamin A is maintained. And since beta � carotene is fat soluble, a little amount of dietary fat is needed for an efficient absorption. Therefore, vitamin A can be stored and cannot be readily excreted.
Beta � carotene supplements are either produced synthetically or extracted from palm oil, algae and fungi. This supplement is extremely safe. However, a more concentrated urine and a yellowish skin may be observed with high doses of beta � carotene, these side effects easily subside if the dosage of beta � carotene is lowered.
Look for beta-carotene at your local or internet vitamin store in softgel form. Always choose name brands like Solaray to ensure quality and purity of what you by for better health.
About The Author: If you don�t eat enough vegetables, add Food beta carotene to your diet risk free at VitaNet �, LLC Vitamin Store. http://vitanetonline.com/ Unique content such as this is available to all who are interested contact me: http://vitanetonline.com/articlerequest.cfm
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=719825
*********************** ARTICLE END ***********************
- To distribute your articles go to http://www.isnare.com/distribution.php
- For more free-reprint articles go to http://www.isnare.com
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