Ted's remedy of using:
1/8 tsp (one, eighth of a teaspoon) Borax for women, OR,
1/4 tsp (one, fourth of a teaspoon) Borax for men,
and 1 (one) capful of 3% (three percent) hydrogen peroxide (H2O2)
in 1 (one) liter of distilled water,
and drinking that 1 (one) liter every day, for a few weeks,
has eliminated nail biting. nails are growing faster as well.
I was not expecting that. I hope that helps.