A specimen should also come from the underside. To avoid serious side effects, users are advised to take only the recommended Kerassentials dose. You will need to take a pill each day for a complete treatment, which usually lasts between 6 to 12 months. The problem is, you need to be approved before you can promote this one. But we may in the future if more studies support its effectiveness. At its worst, it can lead into nail deterioration. Your feet are your lifeline and you can take them with you everywhere.