Tip - How to Substitute for Citric Acid in a Recipe | eHow

All food acids lower the pH of a dish, so you can use the substitute of your choice without losing the effect the acid creates, such as the coagulation of milk when making cheese or the activation of pectin when making jam. Substitute 1 tablespoon of lemon juice or white distilled vinegar for every 1/2 teaspoon of citric acid called for.