The type of the study is double blind randomize placebo-controlled trial with minimum 72 subjects which divided into 2 groups i.e. 1) placebo group which will receive UHT milk (125 mL) and 2) treatment group which will received UHT milk + paraprobiotic Lactobacillus plantarum IS-10506 5 x 1010 CFU/day (125 mL). The subjects have to consume one pack of milk every day for 90 consecutive days. Before and after intervention (day 30 and day 90), several data will be collected i.e. faecal sIgA, blood IgG, IgM, and IgA. The subjects recruited from elementary school in Yogyakarta District.
This study is aimed to determine effect of paraprobiotic Lactobacillus plantarum IS-10506 on humoral immune response by measuring faecal sIgA and blood IgG, IgM, and IgA