Sung and Sanderson1 have suggested that the development of hyperhomocysteinaemia in subjects with Helicobacter pyloriinfection (due to malabsorption and consequent B vitamin deficiency2 ) might provide a link between these two possible causes of coronary heart disease.

Sir,—Sung and Sanderson¹have suggested that the development of hyperhomocysteinaemia in subjects with Helicobacter pylori infection (due to malabsorption and consequent B vitamin deficiency^{2 …}