The effect of different pressure levels Untreated, pasteurized (80 _C/3 min) and HPP (450 - 650 MPa for 3 min at 20 _C) milk- and soy-smoothies were compared. Milk- and soy-smoothies showed a total reduction in microorganisms after pasteurization and HPP at the pressure conditions applied. HPP maintained microbial stability until the end of the storage period (45 days at 4 _C).