Oral care compositions and methods of use

An oral care buffering composition comprising:

• a. a basic amino acid in free or salt form wherein the amino acid is arginine, and wherein the arginine is present from 0.1%-0.6% by wt. of the total composition:
• b. zinc oxide, wherein the zinc oxide is present in an amount from 0.75%-1.25% by wt. of the total composition, and zinc citrate, wherein the zinc oxide citrate is present in an amount from 0.25%-0.75% by wt. of the total composition:
• and
• c. an orally acceptable carrier,
• wherein the oral care composition provides a buffering effect against acidic conditions in the oral cavity following acid challenge or sucrose challenge, wherein the buffering effect is greater than a corresponding buffering effect of compositions comprising arginine, zinc oxide or zinc citrate alone;
• wherein the composition is configured to be maintained at a pH over 7.0 when challenged in an acidic aqueous solution with 0.01M aqueous HCl in an amount of about 60% v/v based on the total volume of the solution.