Showing posts with label beta carotene. Show all posts
Showing posts with label beta carotene. Show all posts

Thursday, 24 November 2011

Reasons of Myopia 孩童近视的原因

Good vision in a child is important since more than 80% of the information a child receives is through vision. However, some children are extremely myopic (nearsighted) at a young age due to early exposure to television, computer, mobile phone games, not only lead to radiation issue but may affects the children's eyes and is detrimental to their vision
Basically, there are three major reasons (in addition to genetic reason) causing myopia, amblyopia and strabismus occurs in children:
1. Refractive errors
Referring to children writing technique (how they hold a pencil), reading or watching television in incorrect posture, poor light or watching television, using computer or playing games in long period of time, some even like to read books while walking or in a moving car, these may easily affect vision.
2. Nutrition Imbalance
Unbalanced child's nutritional intake easily leads to amblyopia and strabismus. Excessive intake of foods high in sugar, such as beverages, ice cream, etc., and do not eat vegetables and other bad habits, may lead to decrease of children's vision.
3. Kidney

Children cannot maintain nutritional balance may lead to weak kidney. It is very important for growing children to have balance nutrition. Thus, let the children eat soy products, milk, vegetables, carrot in order to enhance a child's diet condition. Try to avoid sweets.


良好的视力对于小孩子相当重要,超过80%的信息是通过视觉接收的。然而,小孩子得近视越来越低龄化。孩子们过早接触电视、电脑、手机游戏等,不但会引起辐射问题,还会造成对视力的严重伤害。

造成孩童近视、弱视与斜视基本上有3大原因(除遗传因素外):
  1. 屈光不正:
    指小孩在写字(握笔)、读书、看电视时姿势不正确,光线不足,或长时间看电视、玩电脑、手机游戏,有的喜欢在走路时和在晃动的车上看书等,都很容易影响视力。
  2. 营养不均衡:
    如果孩童所摄取的营养不均衡,容易造成弱视与斜视。

    过多摄入含糖量高的食物,如饮料、雪糕等,以及不爱吃蔬菜等不良生活习惯,都可能导致孩子视力的下降。
  3. 肾虚:
    小孩不能保持营养均衡,就容易肾虚,所以在孩子的成长过程注意营养的摄取是非常重要的。所以多让孩子吃豆类食物、牛奶、蔬菜、胡萝卜等加强孩子的饮食调理。尽量不要吃甜食。


Wednesday, 19 October 2011

Beta Carotene 胡萝卜素

What is Beta-Carotene?

Beta-carotene is one of a group of natural chemicals known as carotenes or carotenoids, which are highly pigmented (red, orange, yellow), fat-soluble compounds naturally present in many fruits, grains, oils, and vegetables (green plants, carrots, sweet potatoes, squash, spinach, apricots, and green peppers).

Beta carotene is converted in the body to vitamin A. Vitamin A serves several biological functions including involvement in the synthesis of certain glycoproteins. Vitamin A deficiency leads to abnormal bone development, disorders of the reproductive system, xerophthalmia (a drying condition of the cornea of the eye), and ultimately death. It is also an antioxidant, like vitamins E and C.

Beta-carotene is converted to retinol, which is essential for vision and is subsequently converted to retinoic acid, which is used for processes involving growth and cell differentiation.

Why Do People Use Beta-Carotene?

  • Prevention against cancer and heart disease

  • Like a natural eye drops, helps to keep the cornea lubricated and transparency, and promote eye health.

  • To slow the progression of cataracts

  • To prevent macular degeneration

  • One of the most effective anti-oxidant to against free radical

  • To boost immunity

  • To protect the skin against sunburn

  • Asthma

  • Depression

  • Infertility

  • Parkinson’s disease

  • Psoriasis

  • Arthritis

 

什么是β-胡萝卜素?

β—胡萝卜素是类胡萝卜素之一,属于天然化学物,也是橘黄色脂溶性化合物,天然的存在于多种水果、谷类、油和蔬菜(绿色植物,胡萝卜,红薯,南瓜,菠菜,杏和青椒)。

β-胡萝卜素会被人体转换成维生素A。维生素A提供多种生物能量,包括一些糖蛋白合成。缺乏维生素A会造成骨骼发育异常,生殖系统疾病,干眼症(一种眼角膜干燥的状况),最终可能导致死亡。它也如同维生素E和C,是一种抗氧化剂。

β-胡萝卜素转化为维生素A,对视觉很重要;随后转化成视黄酸,适用于成长与细胞分化过程中。

 

为何需要β-胡萝卜素?

  • 预防癌症和心疾病

  • 犹如天然眼药水,帮助保持眼角膜的润滑及透明度,促进眼睛的健康

  • 减缓白内障的进展

  • 防止黄斑变性

  • 对抗自由基最有效的抗氧化剂之一 

  • 增强免疫能力

  • 保护皮肤免受晒伤

  • 哮喘

  • 抑郁

  • 不孕不育

  • 帕金森氏症

  • 银屑病

  • 关节炎


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