, contributes to maintenance of normal blood testosterone levels, supports the normal function of the immune system, premium bioavailable citrate form of zinc, delivers 15mg of elemental zinc per tabletzinc is involved in hundreds of processes in the body. up to 20% of the zinc in our bodies is present in the skin where it plays a role in tissue repair & renewal. a staggering one in three adults in the uk receives less than the nutrient reference value (nrv) for this mineral. this is largely a result of refining processes which remove up to 90% of the available zinc content from cereal grains. many nutritionists now prefer the citrate form of zinc used in this product over all other types of zinc compound because citrates are known to be readily absorbed.