Martini M C, Kukielka D, Savaiano D A
Department of Food Science and Nutrition, University of Minnesota, St Paul 55108.
Am J Clin Nutr. 1991 May;53(5):1253-8. doi: 10.1093/ajcn/53.5.1253.
Lactose in yogurt is better digested than lactose in other dairy foods by lactase-deficient individuals, in part because of intraintestinal activity of yogurt microbial beta-galactosidase (beta-gal). The survival and activity of yogurt beta-gal depend on gastrointestinal transit, pH, and viability of the yogurt culture. To evaluate the ability of yogurt beta-gal to digest lactose when yogurt is consumed with food or with additional lactose, 22 healthy lactose-maldigesting individuals were fed 10 test meals. Results of breath-hydrogen expiration, incidence of symptoms, and enzyme and lactose content of gastric aspirates indicate that the consumption of a meal with yogurt does not inhibit, and may slightly improve, lactose digestion from yogurt. However, yogurt beta-gal appears unable to assist in the digestion of additional lactose beyond that normally present in yogurt.
乳糖不耐受个体对酸奶中乳糖的消化能力优于其他乳制品中的乳糖，部分原因是酸奶微生物β-半乳糖苷酶（β-gal）在肠道内的活性。酸奶β-gal的存活和活性取决于胃肠道转运、pH值以及酸奶培养物的活力。为了评估食用酸奶时，酸奶β-gal与食物或额外乳糖一起摄入时消化乳糖的能力，对22名健康的乳糖消化不良个体进行了10次测试餐喂养。呼气氢排出结果、症状发生率以及胃吸出物中的酶和乳糖含量表明，与酸奶一起用餐不会抑制酸奶中乳糖的消化，反而可能会稍有改善。然而，酸奶β-gal似乎无法帮助消化酸奶中正常含量以外的额外乳糖。
