[The problem of the prevention of selenium deficiency in Belgium].

In Belgium the dietary intake of selenium is moderately insufficient. It is in the neighbourhood of the minimum of the recommended allowance. The administration of selenium supplements to healthy Belgian adults favorably modifies biological indices: plasma Se, glutathione peroxidase activity of plasma and thrombocytes. A supplement of 100 micrograms/d is adequate, in salt or in cereals grown with enriched fertilizer.