乳糖
气胀
乳糖酶
摄入
食品科学
人口
消化(炼金术)
乳糖不耐受
腹泻
医学
碳水化合物
生物
化学
内科学
环境卫生
色谱法
作者
Joseph C. Kolars,Michael Levitt,Mostafa Aouji,Dennis A. Savaiano
标识
DOI:10.1056/nejm198401053100101
摘要
Large quantities of yogurt are consumed by some lactase-deficient population groups. We used breath hydrogen measurements to determine whether lactase-deficient subjects absorbed lactose in yogurt better than lactose in milk. Ingestion of 18 g of lactose in yogurt resulted in only about one third as much hydrogen excretion as a similar load of lactose in milk or water, indicating a much better absorption of lactose in yogurt. Ingestion of yogurt also resulted in fewer reports of diarrhea or flatulence than did a similar quantity of lactose ingested in milk or a water solution. The enhanced absorption of lactose in yogurt appeared to result from the intraintestinal digestion of lactose by lactase released from the yogurt organisms. This autodigesting feature makes yogurt a well-tolerated source of milk for lactase-deficient persons and may explain the widespread consumption of yogurt by lactase-deficient population groups.
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