【How-to】What is the exact ph of toothpaste

Because they contain a high amount of citric acid, lemons have an acidic pH. Lemon juice has a pH between 2 and 3, which means it’s 10,000–100,000 times more acidic than water (1, 2, 3). A food’s pH is a measure of its acidity. The pH of lemon juice falls between 2 and 3, meaning it is acidic.