Tuesday, February 1, 2011

Jing Luo, negative energy & nutrients (19)

Lutein Lutein is one form of carotenoid found in dark green leafy vegetables such as spinach, plus various fruits and corn. Egg yolks are also sources of lutein. Our body cannot produce Lutein but has to rely on food. Lutein provides nutritional support to our eyes and skin. Studies suggest that a mixture of nutrients, including lutein, may provide supplemental antioxidant capacity to the skin, helping counteract free radical damage. Lutein may also help prevent or slow down atherosclerosis, the thickening of arteries, which is a major risk for cardiovascular disease. Lutein is an antioxidant that appears to quench or reduce harmful free radicals in various parts of the body. Free radicals can play a role in a variety of chronic diseases. Lutein is said to have help in reducing the risk of Age Related Macular Degeneration (AMD). AMD occurs when the fragile center of the retina–the macula–deteriorates due to aging and damage by free radical. The macula is a small area of the retina responsible for central vision, and high visual acuity. Poor macular health can cause oxidative stress within the retina, leading to a loss of central vision. Lutein also filters the high-energy, blue wavelengths of light from the visible-light spectrum by as much as 90%. Blue light, in both indoor lighting and sunlight, is believed to induce oxidative stress and possible free-radical damage in human organs exposed to light, such as the eyes and skin.

经络、寒气及营养(19)

叶黄素 (Lutein) 叶黄素是从万寿菊菊花中提取的一种天然色素。叶黄素又名“植物黄体素”。叶黄素是一种广泛存在于蔬菜、花卉、水果等植物中的天然物质,居于“类胡萝b类”族物质。人类的眼睛含有高量的叶黄素和玉米黄素(zeaxanthin)但这两种元素是人体无法制造的,必须靠含叶黄素和玉米黄素的食物来补充,若缺乏这两种元素,眼睛就会失明。医学实验证明植物中所含的天然叶黄素是一种性能优异的抗氧化剂可预防细胞衰老和机体器官衰老,同时还可预防老年性眼球视网膜黄斑退化引起的视力下降与失明。预防老年性黄斑变性所导致的盲眼病由于衰老而发生的肌肉退化症可使65岁以上的老年人引发不能恢复的盲眼病。而叶黄素在预防肌肉退化症方面效果良好,由于它在人体内不能产生,因此必须从食物中或额外补充,尤其是老年人必须经常选用含叶黄素丰富的食物。眼睛中的叶黄素对紫外线有过滤作用,有保护由日光,电脑等所发射的紫外线所导致的对眼睛和视力的伤害作用。叶黄素能帮助降低白内障的发生率。叶黄素减轻体内和皮肤退行性老年斑的危险,通过抗氧化作用,降低过氧化脂质的形成。叶黄素防止低密度脂蛋白被氧化,从而减轻心脏病的危险。 叶黄素延缓动脉硬化作用。 叶黄素对多种癌症有抑制作用,如乳腺癌,前列腺癌,直肠癌,皮肤癌等。 叶黄素能帮助改善糖尿病所引起的视网膜毛细管障碍进而改善及恢复视力。