Methods

1. A method of treating one or more symptoms of a gastric disorder in the oral cavity of a subject in need thereof, wherein the method comprises applying to the subject's teeth an oral care composition comprising:

a. a basic amino acid in free or salt form, wherein the basic amino acid is arginine in an amount from 0.1 wt % to 6.0 wt %;

b. zinc oxide and zinc citrate, wherein the zinc oxide is present in an amount from 0.75% by wt. to 1.25% by wt. and the zinc citrate is present in an amount from 0.25% by wt. to 1.0% by wt;

c. an orally acceptable carrier;

wherein the gastric disorder is gastroesophageal reflux disease (GERD); and

wherein the one or more symptoms of the gastric disorder comprise dental erosion due to loss of calcium in the subject's tooth enamel consequent to the presence of gastric acid in the oral cavity.

2. The method according to claim 1 , wherein the oral care composition inhibits or decreases the release of calcium from the subject's tooth enamel.

3. The method according to claim 2 , wherein the inhibition or decrease of the release of calcium in the subject's tooth enamel is relative to a reference standard.

4. The method according to claim 1 , wherein the oral care composition inhibits the release of calcium relative to one or more compositions that do not contain zinc.

5. The method according to claim 1 , wherein the one or more symptoms is that the subject is exposed to gastric acids in the oral cavity during sleep.

6. The method according to claim 1 , wherein the subject is at risk for dental erosion.

7. The method according to claim 6 , wherein the risk for dental erosion is selected from the group consisting of: xerostomia, tooth hypersensitivity, weakened tooth integrity, and tooth discoloration.

8. The method according to claim 1 , wherein the oral care composition comprises:

a. about 1.0% zinc oxide,

b. about 0.5% zinc citrate, and

c. about 1.5% L-arginine.