Replied by Ted (Bangkok, Thailand) on 05/30/2011
It's an EU approved additive number E500. Baking soda is taken after meals. If you are depleted of bicarbonate more than your usual you can take 1/2 teaspoon in one of your meals up to 2 tablespoon of baking soda, but my general remedy is at least 1/4 teaspoon to 2 tablespoon of apple cider vinegar.
For stomach ulcers it helps if 1/16 to 1/8 teaspoon is taken one time a day before sleep. It helps kill the bug that causes ulcers too.
Ted