用氢呼气试验对健康成人乳糖吸收不良症的研究

A STUDY ON THE LACTOSE MALABSORPTION OF HEALTHY ADULT WITH HYDROGEN BREATH TEST.

本文用氢呼气试验对健康成人的乳糖吸收不良症进行了研究，结果发现：健康成人的乳糖吸收不良率（摄入２５ｇ乳糖）高达９２％，中年人（３０～５０岁）的饮奶率和症状发生率均显著高于青年人（１８～２２岁）（Ｐ＜０．０５）。摄入１２ｇ乳糖与摄入２５ｇ乳糖相比，其乳糖吸收不良率，症状发生率，乳糖不耐受率均显著降低（Ｐ＜０．０５）。多数健康成人（７４％）能够耐受１２ｇ乳糖，揭示乳糖酶缺乏者仍然可以一次摄入２５０ｍｌ牛奶（相当于１２ｇ乳糖）。

The lactose malabsorption was studied with hydrogen breath test among healthy adults.The results showed that 92% of them had lactose malabsorption,the percentages of the older subjects(30￣50y) drinking milk and with symptoms were significantly higher than those of the youth(18￣22y).All index examined are lower after consuming 12g lactose than those after consuming 25g lactose.Symptom of intolerance was related to the dose of consuming lactose.About 74% of healthy adults can tolerate 12g lactose.It suggests that the people with lactase deficiency can still drink milk,but its amounts should not exceed 250ml(equal to 12g lactose) every time.