Many Americans, young and old, fall short on vitamins, minerals, and other nutrients, dietary surveys show.
2
在营养方面，老年人根据自身的生理特点及运动的需要合理安排营养膳食有助于延缓衰老，增进健康。
In the nutrition aspect, the old people need to arrange nutrition meals rationally according to their own physiological characteristics and exercise in order to delay the senility and improve health.
3
目的对比食用富硒食品前后老年人血硒水平的变化，为老年人硒膳食营养提供参考。
Objective Compared the change of blood se level in the elderly people before and after taking food enriched-selenium, and provided references of meal nutrition for the elderly people.
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