Table 1 The list of strains used in this study for evaluating lactase activity

Strain name	Strain	Source
DH5	Lactobacillus kefiri	Kefir milk
BLC	Bifidobacterium animalis subsp. lactis	Sacco®-Lyofast BLC1 (Sacco, Cadorago, Italy)
BL720	Bifidobacterium longum	Culture Systems, Inc. (Mishawaka, IN, USA)