Tomatoes become more acidic as they cook longer, so reducing the cook time to the least amount possible can help keep the acid level lower. Sauces and other dishes that require long simmering may make this difficult, but it is recommended that you don’t cook tomatoes for longer than 1 ½ hours.

Are cooked tomatoes OK for acid reflux?

Tomatoes

Cooking tomatoes won’t reduce the acidity enough to prevent acid reflux either, so next time you are making pizza sauce, trying whipping up some fresh pesto instead, and try to limit (or eliminate) tomatoes from your diet.

Are cooked tomatoes acidic or alkaline?

2. Tomatoes. Tomatoes are also very acidic on the outside of the body, which is one reason they can cause irritation to the mouth for many people if they’re eaten in excess.

Adding baking soda will change the pH of tomato sauce, making it less acidic. Generally, we balance tomato sauce acidity by adding a bit of sugar. While sugar can’t neutralize acidity in the same way that baking soda can, it does change our perception of other tastes.