Use Stop'n'Grow's unique double-acting formula to help you stop biting your nails for good. Odourless and colourless its extremely bitter taste immediately deters any nibbling. Within three weeks your nails will be longer and look more attractive - so rather than hiding your hands you'll want to show them off. Stop'n'Grow can also be used to help men and children of 5 years to break their nail biting habit.