INSULIN resistance in association with primary haemochromatosis has been reported on several occasions previously (Allen and Constam, 1929; Root, 1929; Wood and Fitzhugh, 1929; Engel, 1934; Eskind, Franklin and Lowell, 1953; Colwell and Weiger, 1956; Darnaud, Denard, Moreau, Voisin and Pujol, 1958; Uhry, Marcel and Cohen, 1958; Justin-Besancon, Pequignot, Deuil, Etienne, Magdelaine and Jullien,...