Sunshine Can Improve Cancer Odds
From VOA Learning English, this is the Health and Lifestyle report.
We should all let the sunshine in as much as possible – and not just because it makes us feel good. Exposure to sunlight produces vitamin D in our skin. This is why we call vitamin D the "sunshine vitamin."
Vitamin D is good for everybody. In fact, research shows this "sunshine vitamin" could help women with breast cancer live longer.
Breast cancer patients who have high blood levels of Vitamin D have a better a prognosis than women who don't. A prognosis is how quickly a doctor expects a patient to recover or how long a doctor expects a patient to live.
Researchers found that these women had less aggressive cancers. They were also 30 percent less likely to die from the cancer or to get it again.
Researcher Song Yao led the study for the Roswell Park Cancer Institute. He said the study showed that high Vitamin D levels improved the patients' prognosis no matter what type or how advanced their cancer was.
Other benefits of vitamin D
Besides fighting breast cancer, Vitamin D helps the body in other ways.
Most importantly, Vitamin D controls how the body absorbs calcium. It also makes sure the body's immune system works normally.
Getting enough Vitamin D is important for normal growth of bones. If you don't get enough, you are at risk of developing osteoporosis, a disease that makes your bones fragile, brittle, or easy to break.
Several studies show that Vitamin D also strengthens the immune system and helps the body fight disease.
Vitamin D may help reduce your risk of developing heart disease, according to a 2008 study published in the journal Circulation. And, it may also help protect you against getting the flu.
Other studies have shown that vitamin D might help people suffering from depression.
But how do we get enough vitamin D?
Factors in the environment may limit our exposure to sunlight and, therefore, Vitamin D. These factors include pollution, using too much sunscreen, spending too much time inside and living in areas with little sunlight.
So, if you can't get enough sunshine, eat foods that are rich in Vitamin D: egg yolks, cheese and fatty fish such as salmon, sardines, tuna or mackerel.
Some foods such as orange juice, yogurt and cereals are fortified with Vitamin D. They are also good sources.
How much Vitamin D you need is a debated topic. The best way to know if you need more Vitamin D is to get tested by a doctor.
And that's the Health and Lifestyle report.
I'm Anna Matteo.
1.let in 让...进入；嵌入
We opened the windows and let in the glorious evening air.
2.be rich in 富含
Angola was a country rich in natural resources
3.egg yolks 蛋黄
High cholesterol diet are liver, egg yolks, tearing, various animal fats.
4.exposure to 曝光；显露
Continuous exposure to sound above 80 decibels could be harmful.
1.Other studies have shown that vitamin D might help people suffering from depression.
suffering from 遭受；经历
I learned that he was suffering from cancer.
I realized he was suffering from shock.
2.If you don't get enough, you are at risk of developing osteoporosis, a disease that makes your bones fragile, brittle, or easy to break.
at risk of 处于...危险中
He saved three children alive at risk of his life.
An estimated seven million people are at risk of starvation
我们应该尽量让室内充满阳光，阳光的作用不仅可以让我们放松身心 。阳光照射在皮肤上会产生维生素D 。所以我们常称维生素D为“阳光维生素” 。
维生素D对人体大有裨益 。有研究表明，“阳光维生素”可以延长患乳腺癌女性的寿命 。
血液中含维生素D较高的女性乳腺癌患者，其预后结果比维生素D含量低的患者更为理想 。预后指的是医生预期患者康复的速度，或医生预期患者的存活时间 。
研究人员发现这些女性患侵略性癌症的概率低 。其因癌症死亡或复发的概率也降低了30％ 。
研究员宋珧（Song Yao）主导了罗斯韦尔公园癌症研究所（Roswell Park Cancer Institute）的这项研究 。他表示，研究显示无论哪种癌症或病情到哪种程度，高含量的维生素D都可以改善患者的预后 。
最重要的是，维生素D可以调节钙吸收 。此外还可确保身体的免疫系统正常运作 。
充足的维生素D对于骨骼正常发育十分重要 。若补充维生素D不足，那么就容易患上骨质疏松症，这种疾病会导致骨骼脆弱、易折 。
2008年，《循环》杂志发表的一项研究表明，维生素D有利于降低患心脏病的风险 。它还能保护人体免受流感侵袭 。
But how do we get enough vitamin D?
环境因素可能会阻碍我们吸收阳光，即维生素D 。所谓的环境因素包括空气污染，防晒霜使用过量，久待室内和生活在阳光较少的地区 。
橙汁、酸奶和谷物类食品都富含维生素D 。这些食物都可以补充维生素D 。
人体需要补充多少维生素D，这是个颇具争议的话题 。是否需要补充更多维生素D的最直接方法就是找医生测验 。