as pretreatments to weaken cell walls. When the various pretreatments were used, the extraction efficiencies of β - carotene are shown in Table 1. The extraction efficiency of β -carotene using DMSO was 3.371 µ g/mL and those of DMSO with a sonicator and with glass beads were 3.301 and 5.112 µ g/mL, respectively. Pretreatment using both DMSO and a glass bead mixture showed the highest