Yes, Kerassentials formula has received approval from the Food and Drug Administration (FDA). It is produced in a GMP-certified (Good Manufacturing Practices) facility located in the United States (USA). Moreover, the product has garnered several third-party certifications, awards, and a high percentage of positive reviews, all of which attest to its effectiveness in treating fungal infections. Applying the oil four times daily helps to naturally maintain fungus-free skin and nails.