Objective To observe the effect of supplementation of calcium, vitamin d, magnesium, zinc, and copper on bone mineral density and bone strength in rats.

目的观察在补充钙、维生素d的同时补充镁、锌、铜对大鼠骨密度和骨强度的影响。

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Another group with neither magnesium aspartate nor calcium calcium supplementation was used as control.

另设一对照组，其饲粮中不添加天冬氨酸镁和氯化钙。

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One to receive supplementation with vitamin D, one with magnesium, one with both, and one with placebo (an inactive drug).

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