In order to determine effect of trehalose on the survival Lactobacillus paracasei 0.75 g/100g was embedded and microencapsulated by the UVSD process in various matrixes: maltodextrin DE5/DE19- trehalose [1:1] (20 and 30 g/100g) and maltodextrin DE5/DE19- trehalose [2:1] (30 g/100g).