1. An oral care composition comprising: a carrier comprising a solvent； a plurality of enzymes selected from the group consisting of lysozyme, amylase, amyloglucosidase, glucosidase, peptisime and papain； and a composition for neutralizing metal ions, comprising one or more than one compound selected from the group consisting of sodium salt of EDTA (ethylenediaminetetraacetic acid), phytic acid and lactoferrin. 2. An oral composition according to claim 1, further comprising zinc gluconate. An oral composition according to claim 1, further comprising calcium lactate. An oral composition according to claim 1, wherein the solvent comprises distilled water, propylene glycol and sorbitol. The oral composition according to claim 1, wherein the carrier comprises a thickening agent selected from the group consisting of propanediol, carboxymethyl cellulose, cellulose resin, polyvinylpyrrolidone, hydroxyethyl cellulose, xanthan gum, and combinations thereof. The oral composition of claim 1, wherein the carrier comprises a moisturizing agent. A method for treating symptoms of dry mouth using the oral composition of claim 1, comprising the steps of: applying the composition of claim 1 to the oral cavity； deleting a composition. 8. An oral care composition comprising: a carrier, including a solvent； zinc gluconate； a variety of enzymes selected from the group consisting of lysozyme, amylase, amyloglucosidase, glucosidase, peptisime and papain； and composition for the neutralization of metal ions, including one or more than one compound selected from the group consisting of sodium salt of EDTA, phytic1. Композиция для ухода за полостью рта, содержащая:носитель, включающий растворитель；множество ферментов, выбранных из группы, состоящей из лизоцима, амилазы, амилоглюкозидазы, глюкозидазы, пептизима и папаина； икомпозицию для обезвреживания ионов металлов, включающую одно или более чем одно соединение, выбранное из группы, состоящей из натриевой соли ЭДТА (этилендиаминтетрауксусная
