Studies of the effects of citric acid on textiles have found that tensile strength can be damaged by a pH of 2.7 to 3—and lemon juice has a pH between 2 and 3.

Despite its acidic pH, some people say lemon juice has alkalizing effects in the body. This article takes a look at the science behind this claim. READ MORE. Do Lemons Relieve Acne and Acne Scarring?