Currently, 27 states require that dieticians be licensed in order to perform these services. Training includes courses in physiology, dietetics, nutrition, gerontology, and related subjects.

目前，为了执行这项服务，27个国家需要认证的营养师训练包括生理学，饮食学，营养学，老年医学，和其它相关的一些课程。

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Food composition studies are not only basic, but also essential for many purposes in nutrition, food science, and dietetics.

食物成分的研究在食品科学和人类营养学研究中既是应用基础、又是研究工具。

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For answers, I spoke with Leslie Bonci, director of sports nutrition at the University of Pittsburgh Medical Center and a certified specialist in sports dietetics.

为了获得解答，我采访了来自匹兹堡医学中心大学的体育营养系主任，体育饮食认证专家Leslie Bonci。

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When you only eat fruit, you're excluding a lot of valuable nutrients from your diet, says Marisa Moore, registered dietician and spokeswoman for the Academy of Nutrition and Dietetics.

CNN: What's the danger of an all-fruit diet?

Laroche's study appeared in the Journal of the Academy of Nutrition and Dietetics.

CNN: New parent? Watch the saturated fat

Rick Wilson, director of nutrition and dietetics at King's College Hospital London, said most cases of malnutrition were linked to other illnesses, which depressed patient's appetite.

BBC: Many hospital patients are malnourished