Kerassentials Toenail Fungus Canada: Kerassentials is a special, innovative, and all-natural oil-based formula to take out toenail fungus in Canada (CA). It transforms its growth and eliminates it from your nails. As seen on the official website, Dr. Kimberly Langdon is the personality behind Kerassentials. He has created the formula for men and women who believe a natural solution is needed to address the toenail growth and improve nail health.