skin hair etc men require zinc u2153 higher than a women because male semen contains 100 times more of the zinc as it is found in the blood many of the factors hinder the absorption of zinc due to which the real absorption remains at 20 of the total zinc intake zinc has certain recommended limit up to that it is useful otherwise deficiency or toxicity happens intake recommendations for zinc is provided in the dietary reference intakes dris developed by the food and nutrition board fnb at the institute of medicine iom of the national academies formerly national academy of sciences dri is the general term for a set of reference values used for planning and assessing nutrient intakes of healthy people the amount of zinc recommended is 10 mg day women to 12 mg day man for an adult in india has been established by national institute of nutrition hyderabad nin mean absorption and the loss of zinc valued 34 5 and 1 7 mg respectively the current rdas for zinc are listed in table 1 for infants 39 aged 0 to 6 months the fnb established an ais for zinc that is equivalent to the mean intake of zinc in healthy breast fed infants large amount of zinc taken may cause nausea and diarrhea an elevated amount for example 1 2 gm per day for regular basis will harm immune system zinc interferes in the absorption of iron and copper so it is recommended to take it at night after a gap between the supper amp its dose but should not be.