
Keywords: کینورینین; LCT; lactase gene; H2; hydrogen; CH4; methane; CO2; carbon dioxide; TRP; tryptophan; KYN; kynurenine; IDO; indoleamine 2,3-dioxygenase; KYNA; kynuric acid; BDI II; Beck Depression Inventory; BMI; body mass index; HPLC; high-performance liquid chromatograp