Composition for oral care

Composition for oral care comprising: an orally acceptable vehicle; a source of metal oxide particles, wherein said metal oxide particles have a median particle size of from 1 to 7 micrometers; and one or more amino acids that can chelate said metal oxide particles, wherein the metal oxide comprises at least one metal oxide selected from zinc oxide, stannous oxide and copper oxide or a mixture thereof, and in which at least one of said one or more amino acids is selected from L-arginine, cysteine, isoleucine, L-lysine, glutamic acid, serine, and a combination of two or more thereof.