Wytock D H, DiPalma J A
Gastroenterology Service, Wilford Hall USAF Medical Center, San Antonio, TX.
Am J Clin Nutr. 1988 Mar;47(3):454-7. doi: 10.1093/ajcn/47.3.454.
Because of autodigestion of lactose by its endogenous bacteria, the lactose in yogurt is better absorbed than other sources of lactose in lactase-deficient subjects. To investigate possible differences among brands of yogurt in this autodigesting capacity, we challenged eight lactose-malabsorbing subjects with 20 g oral lactose and three different brands of yogurt (Borden, Dannon, and Royal Maid). As a quantitative measure of carbohydrate absorption, end-alveolar breath samples were collected for 8 h and assayed for hydrogen gas. Symptoms were scored by questionnaire every 30 min for 8 h. The cumulative breath H2 and the area under the discontinuous curve of breath-H2 concentration decreased relative to lactose results after ingestion of Dannon and Royal Maid but not after Bordon yogurt. no correlation of symptoms with the degree of carbohydrate malabsorption was demonstrated. We conclude that the lactase activity of yogurt cultures varies among brands.
由于酸奶中的乳糖会被其内源细菌自身消化，因此在乳糖酶缺乏的受试者中，酸奶中的乳糖比其他乳糖来源更容易被吸收。为了研究不同品牌酸奶在这种自身消化能力上可能存在的差异，我们让8名乳糖吸收不良的受试者分别摄入20克口服乳糖以及三种不同品牌的酸奶（波顿、达能和皇家女仆）。作为碳水化合物吸收的定量指标，在8小时内收集终末肺泡呼气样本并检测其中的氢气。每隔30分钟通过问卷对症状进行评分，持续8小时。摄入达能和皇家女仆酸奶后，累积呼气氢气量和呼气氢气浓度不连续曲线下的面积相对于乳糖的结果有所下降，但摄入波顿酸奶后没有下降。未发现症状与碳水化合物吸收不良程度之间存在相关性。我们得出结论，不同品牌酸奶培养物中的乳糖酶活性存在差异。
