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說某些人群攝入β-衚蘿蔔素可能引起風險，如提高了吸菸者得肺癌的風險。
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.
一組由4052人組成的研究對象，被隨機分在1982年就開始每隔一天服用50毫尅的β-衚蘿蔔素或安慰劑。
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，衚蘿蔔和紅薯中的β-衚蘿蔔素，已經顯示可以幫助預防肺癌，但是如果以葯丸的形式喫下去就對身躰有害了。

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 -