Also see: Hypothyroidism, Intestinal Bacterial Overgrowth, & Lactose Intolerance Autoimmunity and Intestinal Flora Am J Physiol. 1995 Jun;268(6 Pt 1):G1066-73. Diet-induced changes in gene expression of lactase in rat jejunum. Goda T, Yasutake H, Suzuki Y, Takase S, Koldovský O. To explore the mechanisms by which jejunal lactase activity is modified by carbohydrate and/or fat [...]