To be used as candidate probiotic lactic acid bacteria have to be stable during cold storage. This research was done by experiment with comparing the viability of Lactobacillus casei subsp. casei R-68 with Lactobacillus casei strain Shirota during cold storage. In this case, including M0 (cold storage week 0), M1 (cold storageweek 1), M2 (cold storage week 2), M3 (cold storage week 3), M4 (cold…