Prohibit nail biting and thumb sucking. Nail biting is a nervous habit that can quickly become uncontrollable. MAVALA STOP has a bitter taste but is harmless and appears clear on the nails. It helps break the habit of nail biting and thumb sucking. It works for children (over 3 years old) and adults. For use without nail polish or over it. It is also recommended for children but not less than 3 years old, because their taste buds are not fully developed and they may get used to the bitter taste. Main ingredients: a component that releases a bitter taste when in contact with saliva. Free from formaldehyde, phthalates, sodium lauryl sulfate, parabens, and fragrances. How to use: Apply a thin layer over the entire nail (or over nail polish) and let it dry. Repeat every two days. Continue the treatment until the nail biting stops. Of course, before each reapplication, remove the previous layer of Mavala Stop using nail polish remover. Discover the detailed treatment plan to stop nail biting at MAVACADEMY. Caution: Do not wash your hands immediately after application.