Abstract: An aqueous composition for removing oral malodor caused by volatile gaseous compounds present in the oral cavity is disclosed herein. The aqueous oral composition comprises one or more of metals selected from the group consisting of Silver, Gold, Zinc, Aluminum, Magnesium and Tin, wherein the metals are present as a stable aqueous nanoparticulate dispersion or a colloid, having an average metal particle size of 1-1000 nm. at a concentration between 1 to 100 ppm. The aqueous oral composition may also include metal particles that may be partially oxidized, by reaction with oxygen including that from air during manufacture or storage. The aqueous oral composition may also include a mucoadhesive polymer selected from a group of water-soluble polymers having an affinity to keratin. The aqueous oral composition may be a synergistic mixture of two or more metal nanoparticulate colloids.