The refining of cereral grains, a major dietry staple in the UK, has been shown to remove up to 90% of the available zinc content of these foodstuffs. This, combined with the trend to eat less animal derived protein, is likely to be one of the reasons why a staggering one out of three adults in the UK receive less than the recommended level of this mineral. This product supplies zinc in citrate form for maximum absorption. Each capsule provides 15mg of zinc (the Recommended Daily Amount).