正文
葉黃素( Lutein,又名黃體素)
本篇純屬營養學簡介，勿扭曲營養品本身有特殊功效，人體需求多寡，實賴醫師指導。
葉黃素(Lutein,屬於類胡蘿蔔素的一種，天然存在於深綠色葉菜類菠菜、甘藍菜之中。自從美國哈佛大學於1994年發現每天攝取6毫克葉黃素可減低老年性黃斑部退化的發生率達57%後，開啟了葉黃素的熱潮。
針對現代人對眼睛的保養，提供類胡蘿蔔素、抗氧化維生素及微量元素，補充視網膜黃斑區所需養分。此產品主要成份為: 葉黃素(Lutein)、玉米黃素(Zeaxanthin)、維生素E、胡蘿蔔素，除對預防老年黃斑病變之外，亦適宜做為一般眼睛保健營養補充。
黃斑部位於視網膜上的微小區域，於此區域含有兩種高濃度的類胡蘿蔔素：葉黃素(Lutein)和玉米黃素(Zeaxanthin)，當過多的藍光進入視網膜時會損害視網膜上的黃斑部，葉黃素和玉米黃素這兩種具有清除藍光的特性，當這兩種色素的密度愈高時，保護黃斑部的效果將更好。
葉黃素 ( Lutein) 在健康食品市場上受到歡迎的原因是它對老化性視網膜黃斑區退化(Age-related Macular Degeneration, 簡稱 AMD)病變的改善具有明顯的效果， 這種疾病如果不加以預防與治療可能會導致視力模糊，看直線時會出現變形彎曲，嚴重者視覺中央會逐漸形成盲點。
Lutein 原本是存在天然蔬果中的一種天然類胡蘿蔔素，人體沒辦法自己合成，必須要由食物中才可獲得，過去許多研究指出 Lutein 對於恢復和改善視力有相當的成效，已經發表的研究分別指出了 Lutein 對於老化性視網膜黃斑區病變、散光、老花眼、假性近視、眼睛疲勞等等具有各種不同程度的改善效果。
根據英國的曼徹斯特大學眼科與神經科學研究中心的臨床研究，結果經過了 15 周的 Lutein 補充之後，視網膜黃斑部的色素有明顯的補充增加的情況，修補了受損的視網膜組織，研究顯示補充 Lutein 對於老化性視網膜黃斑區病變，至少是早期的病變，具有明顯改善的效果。
主持研究的 Dr. Ian Murray 表示，他已經在臨床上看到許多老化性視網膜黃斑區病變的病患因為單純地補充 Lutein 而改善，因此推薦患者能夠服用含有 Lutein 的營養補充品，將會是一個經濟又安全的有效選擇。研究也指出均衡的營養，對於維持眼睛健康扮演一相當重要的角色，但是這些營養素人體無法自己生合成，必須仰賴飲食攝取，所以除了天然食物的攝取，膳食補充品和綜合維他命也是攝取這些營養素的另一有效來源。
葉黃素(Lutein) 和另一種類胡蘿蔔素玉米黃素(Zeaxanthin) 是組成視網膜和黃斑部的重要物質。一般而言，葉黃素於天然蔬果中的含量是玉米黃素的7至10倍，葉黃素可幫助增加黃斑部色素的密度，而且因葉黃素結構上的特性使其具有抗養化的能力，可吸收進入黃斑區對眼睛有害的藍光，避免自由基對黃斑部的傷害，降低老年性黃斑部退化的發生，除了視網膜和黃斑部，葉黃素也存在於眼睛的其他組織(水晶體、虹膜、和睫狀體)中，於維護眼睛的健康上扮演一重要的角色。
http://www.drweil.com/drw/u/id/QAA59576
Lutein: Good for Your Eyes and Heart?
What is your opinion of Lutein supplements for better vision?
Answer: (Published 5/2/2002)
Lutein is one of the carotenoids, yellow and orange pigments found in many fruits and vegetables including mangoes, corn, sweet potatoes, carrots, squash, tomatoes and dark, leafy greens such as kale, collards and bok choy. It is the major carotenoid in the fruit and vegetable rich Asian diet, and a minor one in the typical American diet which doesn\'t contain enough fruits and vegetables.
Related Weil Products
Dr. Weil\'s Vitamin Advisor for Your Body - Foods, herbs and drugs can all interact, sometimes in unexpected ways. Dr. Weil\'s Vitamin Advisor takes known interactions into account when developing recommendations, to help safeguard against adverse effects. Learn more, and get your free, personalized Dr. Weil\'s Vitamin Advisor recommendation today.
There is very good evidence that the lutein in food helps protect against cataracts and macular degeneration, two common, age-related eye disorders. Lutein and another carotenoid, zeaxanthin, form the yellow pigment of the retina and absorb blue light, a harmful component of sunlight. In addition, new evidence from a study completed last year showed that lutein may help protect against clogging of the carotid arteries in the neck, an indication of atherosclerosis, the disease that leads to most heart attacks. The study, at the University of Southern California, found that participants with the highest levels of lutein in the blood at the outset had no increase in plaque in the arteries throughout the 18 months of the study. Just the opposite occurred among those with the lowest lutein levels at the outset - arterial clogging worsened. The researchers also doused sections of human arteries removed during surgery with high concentrations of lutein. They found that these arteries attracted fewer white cells, which are involved in the process that results in clogging.
Despite the importance of lutein to eye and heart health, there are still many unanswered questions about the best way to get it. We don\'t know if supplements have the same effect as naturally occurring lutein in fruits and vegetables. While some studies have shown that taking supplements can help improve vision slightly among people who already have cataracts or macular degeneration, there is only limited evidence that supplements can help prevent either of these conditions, and it remains unclear how much lutein is needed for prevention.
The best thing you can do to prevent eye disorders and heart disease is to make sure that your diet contains lots of the lutein-rich fruits and vegetables. In addition to the ones listed above, you can get zeaxanthin in orange bell peppers, oranges, corn and honeydew melon. Egg yolks also contain both lutein and zeaxanthin, but if you have high cholesterol, you\'re much better off getting the yellow nutrients from fruits and vegetables.
Andrew Weil, M.D.
advertisement
本篇純屬營養學簡介，勿扭曲營養品本身有特殊功效，人體需求多寡，實賴醫師指導。
葉黃素(Lutein,屬於類胡蘿蔔素的一種，天然存在於深綠色葉菜類菠菜、甘藍菜之中。自從美國哈佛大學於1994年發現每天攝取6毫克葉黃素可減低老年性黃斑部退化的發生率達57%後，開啟了葉黃素的熱潮。
針對現代人對眼睛的保養，提供類胡蘿蔔素、抗氧化維生素及微量元素，補充視網膜黃斑區所需養分。此產品主要成份為: 葉黃素(Lutein)、玉米黃素(Zeaxanthin)、維生素E、胡蘿蔔素，除對預防老年黃斑病變之外，亦適宜做為一般眼睛保健營養補充。
黃斑部位於視網膜上的微小區域，於此區域含有兩種高濃度的類胡蘿蔔素：葉黃素(Lutein)和玉米黃素(Zeaxanthin)，當過多的藍光進入視網膜時會損害視網膜上的黃斑部，葉黃素和玉米黃素這兩種具有清除藍光的特性，當這兩種色素的密度愈高時，保護黃斑部的效果將更好。
葉黃素 ( Lutein) 在健康食品市場上受到歡迎的原因是它對老化性視網膜黃斑區退化(Age-related Macular Degeneration, 簡稱 AMD)病變的改善具有明顯的效果， 這種疾病如果不加以預防與治療可能會導致視力模糊，看直線時會出現變形彎曲，嚴重者視覺中央會逐漸形成盲點。
Lutein 原本是存在天然蔬果中的一種天然類胡蘿蔔素，人體沒辦法自己合成，必須要由食物中才可獲得，過去許多研究指出 Lutein 對於恢復和改善視力有相當的成效，已經發表的研究分別指出了 Lutein 對於老化性視網膜黃斑區病變、散光、老花眼、假性近視、眼睛疲勞等等具有各種不同程度的改善效果。
根據英國的曼徹斯特大學眼科與神經科學研究中心的臨床研究，結果經過了 15 周的 Lutein 補充之後，視網膜黃斑部的色素有明顯的補充增加的情況，修補了受損的視網膜組織，研究顯示補充 Lutein 對於老化性視網膜黃斑區病變，至少是早期的病變，具有明顯改善的效果。
主持研究的 Dr. Ian Murray 表示，他已經在臨床上看到許多老化性視網膜黃斑區病變的病患因為單純地補充 Lutein 而改善，因此推薦患者能夠服用含有 Lutein 的營養補充品，將會是一個經濟又安全的有效選擇。研究也指出均衡的營養，對於維持眼睛健康扮演一相當重要的角色，但是這些營養素人體無法自己生合成，必須仰賴飲食攝取，所以除了天然食物的攝取，膳食補充品和綜合維他命也是攝取這些營養素的另一有效來源。
葉黃素(Lutein) 和另一種類胡蘿蔔素玉米黃素(Zeaxanthin) 是組成視網膜和黃斑部的重要物質。一般而言，葉黃素於天然蔬果中的含量是玉米黃素的7至10倍，葉黃素可幫助增加黃斑部色素的密度，而且因葉黃素結構上的特性使其具有抗養化的能力，可吸收進入黃斑區對眼睛有害的藍光，避免自由基對黃斑部的傷害，降低老年性黃斑部退化的發生，除了視網膜和黃斑部，葉黃素也存在於眼睛的其他組織(水晶體、虹膜、和睫狀體)中，於維護眼睛的健康上扮演一重要的角色。
http://www.drweil.com/drw/u/id/QAA59576
Lutein: Good for Your Eyes and Heart?
What is your opinion of Lutein supplements for better vision?
Answer: (Published 5/2/2002)
Lutein is one of the carotenoids, yellow and orange pigments found in many fruits and vegetables including mangoes, corn, sweet potatoes, carrots, squash, tomatoes and dark, leafy greens such as kale, collards and bok choy. It is the major carotenoid in the fruit and vegetable rich Asian diet, and a minor one in the typical American diet which doesn\'t contain enough fruits and vegetables.
Related Weil Products
Dr. Weil\'s Vitamin Advisor for Your Body - Foods, herbs and drugs can all interact, sometimes in unexpected ways. Dr. Weil\'s Vitamin Advisor takes known interactions into account when developing recommendations, to help safeguard against adverse effects. Learn more, and get your free, personalized Dr. Weil\'s Vitamin Advisor recommendation today.
There is very good evidence that the lutein in food helps protect against cataracts and macular degeneration, two common, age-related eye disorders. Lutein and another carotenoid, zeaxanthin, form the yellow pigment of the retina and absorb blue light, a harmful component of sunlight. In addition, new evidence from a study completed last year showed that lutein may help protect against clogging of the carotid arteries in the neck, an indication of atherosclerosis, the disease that leads to most heart attacks. The study, at the University of Southern California, found that participants with the highest levels of lutein in the blood at the outset had no increase in plaque in the arteries throughout the 18 months of the study. Just the opposite occurred among those with the lowest lutein levels at the outset - arterial clogging worsened. The researchers also doused sections of human arteries removed during surgery with high concentrations of lutein. They found that these arteries attracted fewer white cells, which are involved in the process that results in clogging.
Despite the importance of lutein to eye and heart health, there are still many unanswered questions about the best way to get it. We don\'t know if supplements have the same effect as naturally occurring lutein in fruits and vegetables. While some studies have shown that taking supplements can help improve vision slightly among people who already have cataracts or macular degeneration, there is only limited evidence that supplements can help prevent either of these conditions, and it remains unclear how much lutein is needed for prevention.
The best thing you can do to prevent eye disorders and heart disease is to make sure that your diet contains lots of the lutein-rich fruits and vegetables. In addition to the ones listed above, you can get zeaxanthin in orange bell peppers, oranges, corn and honeydew melon. Egg yolks also contain both lutein and zeaxanthin, but if you have high cholesterol, you\'re much better off getting the yellow nutrients from fruits and vegetables.
Andrew Weil, M.D.
advertisement
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