SummaryZinc is an essential trace element and is required for such processes as growth, immunity and reproduction. Many people, even in this country, have a marginal intake of zinc and several common dietary constituents can impair its absorption. Despite homoeostatic regulation of zinc absorption, subclinical zinc deficiency may be common, although it is difficult to detect. Attention to the zinc nutrition of at‐risk groups such as the malnourished, children, pregnant women and the elderly is therefore required. Zinc is relatively non‐toxic and should be used in the prevention and treatment of zinc deficiency and possibly other disord