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语言朋友(55) People who increased their intake over just six weeks developed a healthy glow and appeared more attractive, researchers found.Scientists at St Andrews University found eating them slightly increased yellow and red pigments in the volunteers' skin.They monitored the food intake of 35 people and took pictures of their faces, arms and hands using a sensitive camera at the start, and after three and six weeks.Increasing their intake of greens by 2.9 portions a day was found to make the person look more healthy and an extra 3.3 portions could enhance their attractiveness, when their photographs were rated by others. Fruit and vegetables are rich in carotenoids (类胡萝卜素) it was known eating extreme amounts of certain vegetables such as carrots could turn skin orange，it was not known a small increase was perceptible(被觉察)to others－and was seen as appealing.htness, and found it significantly changed in people who naturally increased their intake.These changes were not evident in three weeks.Using light sensors, the researchers showed these red and yellow hues were linked with the levels of carotenoids in their skin.There are hundreds of carotenoids but those thought to have the most dramatic effect are lycopene(番茄红素)－which gives tomatoes and red peppers their red colour－and betacarotene found in carrots as well as broccoli, also affected by chemicals called polyphenols(多元酚)解题导语：研究发现多吃水果和蔬菜让人看起来更漂亮。y look more attractive in three weeks. | 
