Are all Coca-Cola ingredients publicly known?
No. U.S. product labels list Coca-Cola Original’s major ingredients—carbonated water, high fructose corn syrup, caramel color, phosphoric acid, natural flavors, and caffeine—but they do not spell out the exact proprietary flavor blend or its proportions.
The company treats that flavor formula as a long-standing trade secret. So the public can see the required ingredient names on the can, while the detailed recipe behind “natural flavors” remains private.