Does lemon juice dry out your hair?

Yes. Lemon juice can retard hair growth. The first and second time you will get some ache but after that you will get affect of of the lemon

In a US Patent for a hair growth inhibitor, the two main ingredients are citric acid (20%) and sodium chloride - salt (20%). Lemon juice contains citric acid but no electrolyte (salt) to make it elecrically conductive and therefore effctive. My next step will be to mix citric acid and salt in a moisturising lotion, aloe vera gel or similar and see how it works. The ingredients should be gently heated to aid dissolution and then allowed to cool to room temperature.