Disclosed herein are probiotic compositions comprising a mixture of at leastsix probioticbacteria, including Streptococcus salivarius K12® (BLIS K12®) and atleast fiveLactobacillus bacteria. The Streptococcus salivarius K12® (BLIS K12®)may compriseStreptococcus salivarius K12® (BLIS K12®) BAA1024. The Lactobacillusbacteria maybe selected from those known to be suitable for oral administration, forexample fromthose known to improve recipient health, particularly recipient oral health.