The groups then gave more blood samples and switched their original diet assignments: Those who had been in the comparison group were asked to eat watercress for eight weeks; those who were previously assigned to eat watercress were told to follow their n
The groups then gave more blood samples and switched their original diet assignments: Those who had been in the comparison group were asked to eat watercress for eight weeks; those who were previously assigned to eat watercress were told to follow their n
然后小组中的受试者们再提供一次血样并且掉或他们的饮食安排：那些对照受试者被要求吃八周豆瓣菜；那些先前吃豆瓣菜的受试者则继续他们的正常饮食，但没有给他们提供豆瓣菜。