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Topic: Zeaxanthin

In the News (Fri 11 Dec 09)

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	Zeaxanthin Study
		The study established that photoprotection was strongly correlated with the concentration of zeaxanthin in the retinas of the quail.
		Zeaxanthin is well suited to its role in maintaining retinal health, and may be an important strategy to prevent or intervene in macular degeneration.
		Two dietary micronutrients, zeaxanthin and lutein, are carotenoids derived from fruits and vegetables that are uniquely concentrated in the macula of the human eye where they are likely to protect against blue light and oxidative damage.
	www.eyesight.org /Research/Research-Zeaxanthin/research-zeaxanthin.html (2324 words)

	Lutein and Zeaxanthin
		Zeaxanthin is the predominant pigment in the fovea, the region at the center of the macula.
		The quantity of zeaxanthin gradually decreases and the quantity of lutein increases in the region surrounding the fovea, and lutein is the predominant pigment at the outermost periphery of the macula.
		Lutein and zeaxanthin that are derived from supplements or released from the matrices of foods, are either solubilized in the lipid core of micelles (formed from bile salts and dietary lipids) in the lumen of the small intestine, or form clathrate complexes with conjugated bile salts.
	www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/lut_0164.shtml (2281 words)

	Molecular Expressions: Phytochemical Gallery - Zeaxanthin
		Zeaxanthin is a yellow-colored lipid-soluble xanthophyll, which is also an oxidized hydroxy derivative of beta-carotene.
		This biochemical, a strong antioxidant and one of two yellow carotenoids found in the retina, is abundant in spinach, collard greens, and corn.
		It is widely believed that zeaxanthin acts to filter and shield harmful blue light from the eye and protect against age-related macular degeneration, the leading cause of blindness in people over 65.
	micro.magnet.fsu.edu /phytochemicals/pages/zeaxanthin.html (203 words)

	Comprehensive Nutrient Review: Zeaxanthin Overview
		Zeaxanthin like lutein is a carotenoid found in highest concentration in the macular region of the eyes.
		Zeaxanthin may prevent age-related macular degeneration (ARMD); help prevent glaucoma and cataracts; support normal eye health; and is a powerful antioxidant.
		Zeaxanthin is the dominant component in the center of the macula, while lutein dominates at the outer edges.
	www.lef.org /abstracts/codex/zeaxanthin_index.htm (250 words)

	Zeaxanthin (Site not responding. Last check: )
		Zeaxanthin is a member of a group of nutrients referred to as carotenoids.
		Zeaxanthin is well tolerated and is generally considered a safe therapeutic substance when taken in recommended doses.
		Zeaxanthin is a phytochemical that has not yet been established as an essential nutrient; however data suggests that it should be considered a conditionally essential nutrient.
	www.supplementnews.org /zeaxanthin (732 words)

	Reference.com/Encyclopedia/Zeaxanthin
		Zeaxanthin is one of the two carotenoids contained within the retina of the eye.
		Within the central macula, zeaxanthin is the dominant component, whereas in the peripheral retina, lutein predominates.
		Zeaxanthin breaks down to form picrocrocin and safranal, which are responsible for the taste and aroma of saffron.
	www.reference.com /browse/wiki/Zeaxanthin (391 words)

	Zeaxanthin - Supplements
		Lutein and zeaxanthin are carotenoids found in highest concentration in the macular region of the eyes (the back of the eye where the retina is located), where they are believed to help filter out damaging blue light and prevent free radical damage to the delicate structures in the back of the eye.
		Lutein and zeaxanthin are yellow pigments found in high concentrations in egg yolks, yellow fruits and vegetables as well as in dark green, leafy vegetables.
		Several observational studies have shown that high dietary intakes of lutein and zeaxanthin (from spinach, broccoli and eggs) are associated with a significant reduction in the risk for cataract (up to 20%) and for age-related macular degeneration (up to 40%).
	www.supplementwatch.com /suplib/supplement.asp?DocId=1288 (1368 words)

	Zeaxanthin is a carotenoid with antioxidant properties that benefits macular health.
		Zeaxanthin is the most potent antioxidant carotenoid found in the retina and acts as a filter and shield against the damaging near-to-UV blue light from the sun.
		Zeaxanthin cannot be synthesized by human beings, and therefore must be supplemented as part of the diet.
		Zeaxanthin does not repair the eye to the point where vision will be restored.
	www.visivite.com /zeaxanthin.html (505 words)

	Wolfberry w/ Zeaxanthin
		Zeaxanthin is deposited in a 2:1 ratio vs. Lutein in the center of the macula.
		Zeaxanthin is rare in the diet and is preferentially taken up by the macula and deposited in the most crucial portion of the macula and Retina.
		Zeaxanthin and Lutein are members of the carotenoid family — a group of natural plant pigments that also includes beta-carotene and lycopene.
	www.mindbodyhealth.com /wolfberry.htm (1542 words)

	Lutein , Zeaxanthin
		Lutein and zeaxanthin are carotenoids found in highest concentration in the macular region of the eyes (the back of the eye where the retina is located), where they are believed to help filter out damaging blue light and prevent free radical damage to the delicate structures in the back of the eye.
		Lutein and zeaxanthin are yellow pigments found in high concentrations in yellow fruits and vegetables (obviously) as well as in dark green, leafy vegetables.
		In the macula region of the eye, lutein and zeaxanthin serve to protect eye tissues from free radical damage and from photo-oxidizing damage of light rays (by filtering blue light).
	www.jcrows.com /lutein.html (996 words)

	Study Demonstrates Essential Role of Zeaxanthin in Eye Health
		Macular pigment, which is primarily composed of lutein and zeaxanthin, is thought to protect the retina from damage due to light exposure and oxidative stress.
		Zeaxanthin is the dominant component in the center of the macula, while lutein dominates at the outer edges.
		The range is from nearly all zeaxanthin in some orange fruits and vegetables to nearly 40:1 lutein to zeaxanthin in some dark leafy greens.
	www.mdsupport.org /library/zeaxanthin.html (2310 words)

	WHFoods: lutein and zeaxanthin
		The eyes are repositories for carotenoids with lutein and zeaxanthin concentrated in the retina and lens.
		A low dietary intake of carotenoids such as lutein and zeaxanthin is not known to directly cause any diseases or health conditions, at least in the short term although long-term inadequate intake of carotenoids is associated with chronic disease, including heart disease and various cancers.
		Carotenoids such as lutein and zeaxanthin are fat-soluble substances, and as such require the presence of dietary fat for proper absorption through the digestive tract.
	www.whfoods.com /genpage.php?tname=nutrient&dbid=126 (1392 words)

	Zeaxanthin: by Ray Sahelian, M.D., zeaxanthin benefit
		Zeaxanthin is a carotenoid found in many vegetables and fruits, particularly green leafy vegetables such as kale and spinach.
		After supplementation, plasma zeaxanthin increased 2.5-fold: mean values on day 1 and 29 were 0.038 and 0.096 micromol/l, respectively, for the supplementation group; and 0.038 (sem 0.003) and 0.043 (sem 0.003) micromol/l, respectively, for the control group.
		Zeaxanthin (pronounced zee-uh-zan’-thin) is a dietary carotenoid found mostly in the macula, the central part of the retina in the eye that is responsible for most fine vision.
	www.raysahelian.com /zeaxanthin.html (1798 words)

	Correlates of Serum Lutein + Zeaxanthin - Science - RedOrbit
		Lutein and its structural isomer, zeaxanthin, are 2 carotenoids that are concentrated in tissues of the eye.
		Although several previous studies reported dietary and lifestyle correlates of lutein and zeaxanthin, the current investigation was conducted in a sample that represents the American population and has available a broader range of lifestyle, anthropometric, and biochemical measurements that may relate to serum carotenoids.
		Variation in serum lutein + zeaxanthin, related to intake, may be caused by the competition of serum, tissues, and the retina for these carotenoids or other unknown endogenous or external factors that influence their absorption or distribution.
	www.redorbit.com /news/display?id=91036 (4822 words)

	Why Lutein and Zeaxanthin Are Becoming So Popular
		Zeaxanthin is the stereoisomer of lutein—that is, it possesses the same chemical structure but in a different configuration.
		Lutein and zeaxanthin are antioxidants that destroy harmful free radicals generated by exposure to light,9 which initiates oxidative damage in the eyes and skin.
		In the eye, lutein and zeaxanthin are known as the macular pigments, which are important for absorbing visible light, reducing light scatter in the eye, and providing antioxidant protection.
	www.lifeextensionvitamins.com /whyluandzear.html (1820 words)

	An eye on health (Site not responding. Last check: )
		Zeaxanthin is the dominant component in the centre of the macula, while lutein dominates at the outer edges.
		Although zeaxanthin and lutein belong to the same carotenoid family, they are slightly different in their chemical structure, which makes zeaxanthin able to function more effectively than lutein in the macular.
		In the macular, the concentration of zeaxanthin is twice that of lutein.
	www.thestar.com.my /health/story.asp?file=/2007/1/7/health/16481126&sec=health (785 words)

	Lutein and Zeaxanthin - Eye-Friendly Nutrients
		The carotenoids lutein (pronounced loo-teen) and zeaxanthin (pronounced zee-uhzan-thin), which are antioxidants and the only carotenoids located in the eye, may protect against cataracts and AMD.
		A study of 372 men and women aged 66-75 in England found that the risk for specific type of cataracts was the lowest in people with the highest amount of lutein in their blood.
		Dark green leafy vegetables are the primary source of lutein and zeaxanthin, but they are also present in lesser amounts in other colorful fruits and vegetables, such as broccoli, orange peppers, corn, peas, persimmons and tangerines.
	www.aoa.org /x4732.xml (698 words)

	US FDA/CFSAN - Qualified Health Claims: Letter of Denial - Xangold® Lutein Esters, Lutein, or Zeaxanthin and ...
		In this instance, it is not necessary for FDA to determine whether lutein and/or zeaxanthin should be considered as subjects of the proposed claim, in addition to Xangold® lutein esters, because including studies of lutein and/or zeaxanthin does not change FDA's ultimate conclusion that the petition should be denied for lack of credible evidence.
		Because serum and tissue lutein and zeaxanthin levels are poorly correlated with dietary intake, and many known and unknown factors can alter these levels, no scientific conclusions about the relationship between intake of Xangold® lutein esters, lutein, or zeaxanthin and risk reduction of AMD or cataracts can be drawn from these 9 studies.
		Beta-carotene, lutein and zeaxanthin are members of the carotenoid family ("Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids," A Report of the Panel on Dietary Antioxidants and Related Compounds, Food and Nutrition Board of the Institute of Medicine, 2000).
	www.cfsan.fda.gov /~dms/qhclutei.html (7009 words)

	optisharp - Simply more for your eyes - Glossary
		Lutein and zeaxanthin are believed to act complementarily in the prevention of eye diseases such as cataracts and AMD.
		Zeaxanthin, like all carotenoids, cannot be made by the body, and high levels can only be obtained from dietary supplements.
		Zeaxanthin is found in high concentration in the human retina.
	www.optisharp.com /en/glossary (1638 words)

	Zeaxanthin Supplement
		Zeaxanthin, (pronounced: zay-uh-zan-thin), is a type of carotenoid found in fruits and vegetables.
		Zeaxanthin is responsible for the yellow color of corn.
		Zeaxanthin is most highly researched in regards to eye health.
	www.lifescript.com /channels/diet_fitness/supplements/zeaxanthin.asp?page=1 (255 words)

	Zeaxanthin,Lutein,Marigold Extract
		The carotenoids lutein and zeaxanthin were the most strongly associated with reduced risk of MD. These are obtained primarily from dark green, leafy vegetables such as spinach, collard greens, kale, mustard greens, and turnip greens.
		Daily amounts of lutein and zeaxanthin are generally recommended at 20 mg of lutein and 6-10 mg of zeaxanthin.
		Zeaxanthin is available in a single pill containing the recommended amount by only one company, ZeaVision (www.zeavision.com), which owns the patent.
	www.cactusbotanics.com /zeaxanthin.htm (876 words)

	Natural Products Association:
		It is not a precursor of vitamin A. In foods zeaxanthin is often found with lutein; it is especially high in corn, persimmons, and spinach (1B).
		Meso-zeaxanthin, an isomer of zeaxanthin (2A), is found in a variety of animals and in the human eye but does not appear to be a dietary carotenoid.
		Zeaxanthin, meso-zeaxanthin and lutein are the major components of the macular pigment, the colored material in the center of the retina in primates, an area known as the macula lutea.
	www.naturalproductsassoc.org /site/PageServer?pagename=rr_bg_zeaxanthin (897 words)

	Lutein -- Zeaxanthin Molecule -- Antioxidant
		Although lutein and zeaxanthin have identical chemical formulas and are isomers, they are not stereoisomers.
		Lutein and zeaxanthin are phytochemicals found most often in leafy green vegetables, but also in other fruits and vegetables.
		Chicken egg yolks are a rich food source of lutein and zeaxanthin; he average amount of lutein in chicken egg yolk is approximately 290 micrograms per yolk, and the average amount of zeaxanthin, approximately 210 micrograms per yolk.
	www.worldofmolecules.com /antioxidants/lutein_zeaxanthin.htm (284 words)

	Lutein and Zeaxanthin Monograph
		Lutein and zeaxanthin belong to the xanthophyll family of carotenoids and are the two major components of the macular pigment of the retina.
		Numerous observational studies have examined the correlation between lutein and zeaxanthin concentrations in the macula, dietary intake, and macular degeneration.
		Studies examining lutein and zeaxanthin levels in extracted cataractous lenses have found up to three-fold higher levels in the newer epithelial tissue of the lens than in the older inner cortex portion.
	www.chiro.org /nutrition/ABSTRACTS/Lutein_and_Zeaxanthin_Monograph.shtml (927 words)

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