There was no positive evidence that any birth defects had arisen as a result of Vitamin A intake.

没有确凿证据表明摄入维生素A会导致先天缺陷。

《柯林斯英汉双解大词典》

The bag contained her school gym clothes, a plastic canister with vitamin drinks, and a lunchbox.

袋里装着她学校的体育服、一个装着维他命饮料的塑料水罐和便当盒。

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The results of a growing number of studies suggest that even a modest vitamin shortfall can be harmful to your health.

越来越多的研究结果表明，即使是轻微的维生素缺乏也会对健康有害。

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Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.

VOA: special.2009.04.21

How much Vitamin A should they have?

他们应该摄入多少维生素A

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now the fact that people were so reliant on certain foods led to deficiencies of certain nutrients, so people that were dependent on a rice based diet tended to have problems with deficiencies in protein, Vitamin A, and thiamine.

人们过于依赖某些特定的食物,导致了某些营养元素的匮乏,因此,以米饭为主食的人,很可能缺少蛋白质,维生素A和维生素B1

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Other drugs are being studied for their promise in preventing breast cancer, including a Vitamin A-derivative called fenretinide and the antiosteoporosis drug raloxifene, sold by Eli Lilly lly (nyse: lly - news - people) under the brand name Evista.

FORBES: Old Breast Cancer Drug Brings in New Money

Beta carotene is a type of carotenoid, a plant pigment that is a provitamin for vitamin A. During its digestion and metabolism, a percentage is converted to vitamin A, a fat-soluble vitamin that is important for vision, growth and development, and healthy immune and reproductive function.

CNN: Should I take beta carotene as a supplement?

Make sure to eat plenty of high-quality, lean protein like fat-free dairy, egg whites, fish and skinless chicken (protein should make up about 20 percent of your total calories) and limit vitamin A fortified foods or multivitamins with high doses of vitamin A, which can negatively impact bone health.

CNN: How much weight is needed to strengthen my bones?