Phosphoric acid in soft drink and tooth decay

This is how it works. Sugar is converted to glycoproteins, which coat your teeth and become plaque. Sugar then soaks into them, and deep into the plaque, and in contact with your teeth the environment is anaerobic. Under these conditions the sugar is converted to lactic acid. Lactic acid is a pretty strong acid and that’s what dissolves the calcium phosphate that your teeth are made out of