Relationship of milk consumption to blood glucose rise in lactose intolerant individuals.

Lactose intolerant populations are heterogeneous with respect to their milk-drinking habits. A gradation of lactase activity in the intolerant population may result in sufficient lactose hydrolysis to obviate symptoms and lead to continued milk consumption. This paper reports on differences in maximum blood sugar rise in lactose intolerant children who are observed to consume or reject milk. Of the 89 black elementary school children, 48 (54 per cent) evidenced a flat lactose tolerance curve. Twenty-eight of these 48 children (58 per cent) were defined as nonmilk drinkers. The maximum blood sugar rise was 12.3 mg/100 in the 20 lactose malabsorbers who were defined as milk drinkers. It appears that some lactose malabsorbing children may have sufficient, albeit lower, levels of lactase to hydrolyze moderate amounts of milk.