Many studies suggest taking more than 75 milligrams of zinc every day for effective treatment, but the Institute of Medicine says the tolerable upper limit is only 40 milligrams a day.

很多研究认为，每天服用超过 75 毫克的锌治疗效果会很有效，但是美国医学学会称人每天最多服用 40 毫克锌。