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锌在人体内含量不高但属于必需的微量元素。正常成人体内含锌量约2.5克,锌的一日生理需要量,成人为0.2mg/kg体重,儿童为0.3～0.6mg/kg体重。锌在人体内的分布并不均匀,眼、头发、骨及男性生殖器官的含锌量最高,肝肾及肌肉的锌含量属中等,在人的生命活动中锌起着极其重要的作用,它可使细胞和活体内的某些生物学过程加速,并影响酶细胞膜的通透性,而这些酶又参与脂肪、蛋白质及碳水化合物的代谢。人体内锌的需要量与吸收之间存在明显正相关,正常情况下锌的吸收系数平均为33％。锌由肠胃本身吸收的很少,而排泄却主要在肠道(约占90～95％)。一般正常情况下尿排泄
Zinc in the human body is not high but it is an essential trace element. Normal adult body zinc content of about 2.5 grams, zinc day physiological requirements, adult 0.2mg / kg body weight, children 0.3 ~ 0.6mg / kg body weight. Zinc distribution in the human body is not uniform, eye, hair, bone and male genital organs of the highest zinc content, liver and kidney and zinc content is moderate, zinc plays an extremely important role in human life activities, it Can accelerate some biological processes in cells and in vivo, and affect the permeability of the enzyme cell membrane, which in turn are involved in the metabolism of fats, proteins and carbohydrates. There is a clear positive correlation between the amount of zinc in the body and its absorption, and the average zinc absorption coefficient is 33% under normal conditions. Zinc absorbed by the stomach itself is very small, but mainly in the intestinal excretion (about 90 to 95%). Urinary excretion under normal circumstances