Related Experiment Video
Updated: Jul 13, 2026

Measuring Lactase Enzymatic Activity in the Teaching Lab
Published on: August 6, 2018
[The methods to reduce the prevalence of lactose intolerance in children]
Xian-feng Zhao1, Li-li Pan, Jing Meng
1National Institute for Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
Objective:
To identify methods in reducing the prevalence of lactose intolerance in children.
Methods:
A hydrogen respiration test (HRT) method was used in screening lactose intolerance (LI) subjects after taking 25 g of lactose among 106 children aged from 10 to 11 years old in a primary school located in the suburban area of Beijing. A cross-design was used to detect the effects of low lactose milk, yogurt and cereal-effect among 68 selected LI children.
Results:
The incidence of LI was 80.2% after the children took 25 g of lactose, and after taking a 250 ml of full milk, lactase-fermented milk, coinfected milk, yogurt, or milk with meal, the LI incidences were 21.1% (12/57), 0% (0/25), 6.1% (2/33), 8.6% (3/35) and 13.6% (3/22) respectively.
Conclusion:
Low lactose milks and yogurt could reduce the LI incidence among LI children significantly.
More Related Videos
Related Concept Videos
Microbes in Food Production
Punnett Squares
Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption
Development of Human Microbiota
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the colonic...
Drugs for Treatment of Constipation-Predominant IBS

