Requirement 1: composition: oral care: oral care is characterized by routine care and at least one polyhydroxyalkylalcohol, in which case the weight ratio and routine ratio of polyhydroxyalkylalcohol are selected from the ratio of at least 5:1, 10:1 and 5:1-50:1. Claim 7: the oral care composition conforming to claim 5, which is characterized in that at least one polyhydroxyalkylalcohol comprises propylene glycol and glycerin, wherein the weight ratio of propylene glycol to glycerin is 10:90-90:10； 15:85-85:15； 15:85-25:75； 45:55-55:45； 85:15-75:25, 80:2050:50 and 20:80 Claim 16: the composition of oral care in accordance with claim 5, which is characterized by: at least one polyhydroxyalkylalcohol contains acrylonitrile and sorbitol, in which case, the weight ratio of propylene to sorbitol selected is 70:30-90:10, 75:25-85:15 and 80:20. Requirement 25: a method for improving the oral health of persons in need of oral health care, characterized by the application of an effective amount of any oral health component to the oral cavity of persons in need of oral health care to reduce inflammation according to requirements 1 to 24.Reduce oxidative oral injury to soft tissue or soft tissue, and / or promote wound healing or oral sectioning. Claim 31: a method for preparing oral care ingredients, characterized by: (a) routine dissolution into solvent to form a mixture； and (b) mixing, mixing, mixing, and mixing one or more additional ingredients to form oral care ingredients； The solvent contains at least one polyhydroxyalkyl alcohol. Claims 36: methods 31 to 34 consistent with any one claim,1. The solvent is characterized by the first polyhydroxyalkylalcohol and the second polyhydroxyalkylalcohol, and the routine solubility of the first polyhydroxyalkylalcohol is higher than that of the second polyhydroxyalkylalcohol； Stage (a) includes (I) dissolving a tar from the first polyhydroxy alcohol to form a solution； and (II) mixing a tar from the second polyhydroxy alcohol to
