Pure Apple cider vinegar...liquid of pill form.

Almost an instant result.

Edit - Apple Cider Vinegar is known for its good properties and will
among other things, lower blood pressure. The pill form comes
in dosages of 150 mg to 500 mg. A good health food shop will tell
you the dosage to take. If you are unsure ask your doctor first.

It is absolutely incredible to see the change inside a week.
The nails will take on a new healthy appearance and growth.