In vitro test of cholesterol-related activities of LAB isolated from Tibetan kefir grains.

a, bMean values within the same column with different superscripted letters differ significantly (PThe data are shown as the mean ± standard deviation.同列内带有a、b等不同上标字母的均值存在显著统计学差异（P）；数据以均值±标准差（mean ± standard deviation）表示。