Table 3. Effects of cryoprotectants on the cell viability (CFU/g) of freeze-dried L. fermentum SK152 during storage at 20°C

week 0 1 3 5 7 Survival rate after 7 weeks (%)
Skim milk 1.3×108 1.7×108 7.3×107 2.0×107 1.7×107 12.5
Trehalose 8.7×107 7.3×107 3.0×107 2.0×107 1.0×107 11.5
Glucose 1.0×108 1.0×108 4.3×107 2.7×107 9.0×106 9.0
Dextrin 3.2×108 1.7×108 6.0×107 1.3×107 1.3×107 4.2