Tip - How to Substitute Lemon Juice for Citric Acid | LIVESTRONG.COM

The substance in lemon juice that causes its characteristic sour flavor is citric acid. This acid is used in flavored drinks, baked goods and other foods that call for a lemon taste. It's also used in canning, cheese making and industrial processes as a pH regulator. Substituting lemon juice for citric acid is easier for some applications than...