beta carotene

基本解释

Taking beta carotene may have risks for some people such as raising lung cancer risk in smokers, Grodstein said.
Grodstein说某些人群摄入β-胡萝卜素可能引起风险，如提高了吸烟者得肺癌的风险。
Those in a group of 4,052 men were randomly assigned in 1982 to take either 50 milligrams of beta carotene or a placebo every other day.
一组由4052人组成的研究对象，被随机分在1982年就开始每隔一天服用50毫克的β-胡萝卜素或安慰剂。
Beta carotene found in carrots and sweet potatoes, for example, has been shown to help protect against lung cancer, but may be harmful when taken in pill form.
例如，胡萝卜和红薯中的β-胡萝卜素，已经显示可以帮助预防肺癌，但是如果以药丸的形式吃下去就对身体有害了。

They stayed alive on sweet potatoes, a rich source of calories, vitamin A and beta carotene.
FORBES: Millions Served
One proven risk reducer is a blend of high doses of vitamins C and E, beta carotene and zinc.
FORBES: Magazine Article

the most important form of the plant pigment carotene, which occurs in milk, vegetables, and other foods and, when eaten by man and animals, is converted in the body to vitamin A -