I waited 40 days of treatment to enable me to assess this essential oil. Now I can say it is very effective against nail fungus (toe). Yet I have not followed scrupulously dosage (a daily application to the nail) I sometimes left 2 or 3 days between applications. To date, the new part of the nail is perfectly normal (color and shape). In a few weeks the nail has regained its original form. Finally, you will make a nice savings compared to products sold in pharmacies and efficiency is there. Do not hesitate. Gilles de Nîmes