[2 stars] In one trial, supplementing with Bifidobacterium longum strain BB536 during the pollen season significantly decreased symptoms such as sneezing, runny nose, nasal blockage.Learn MoreCloseHIV and AIDS SupportTake under medical supervision: 1 gram three times per day of Saccharomyces boulardii for diarrheaas Saccharomyces boulardii[2 stars] In one trial, Saccharomyces boulardii helped stop