Methods: One-month old male rats were randomly divided into ad libitum (AL), pair-fed (PF) and zinc deficient (ZD) groups which fed on the synthetic diet for 5 weeks to produce zinc deficiency models.

• 方法1月龄雄性大鼠随机分为自由摄食(AL)、对饲(PF)和缺锌(ZD)组，以合成饲料饲养5周，制备缺锌动物模型。