An Open-label Study Evaluating the Effectiveness of CGB-400 Topical Gel for Fungal Infection

Inclusion Criteria: 1. Male or female ≥18 (and ≤99) at the time of Informed Consent. 2. Nail fungal infection of at least one great toe \[per visual assessment by the clinical investigator\] 3. Subjects who have target toenail showing 20-65% involvement as judged by the clinical investigator. 4. Subject must be physically able to reach toes to clean them and apply product. 5. Subject is willing to discontinue use of other nail fungus treatment products and nail cosmetic products for duration of this study. 6. Subject is willing and available to return for study follow up. 7. Signed written informed consent form (ICF) prior to any trial related activity (subjects must have the mental, literate, and legal ability to give a written informed consent, which must comply with the ICH GCP guidelines and local requirements. 8. Agree to take and share pictures of the treated toenails on a periodic basis during the study and follow-up period. Exclusion Criteria: 1. Female subjects that are pregnant, breast-feeding, or of childbearing potential and not practicing reliable birth control. 2. Known hypersensitivity or previous allergic reaction to any constituent of the Investigational Product (i.e., essential oils, fragrance, choline, phosphatidylcholine, propylene glycol, limonene, cellulose). 3. Nails with clinical evidence of no or low distal growth. 4. History or presence of another skin/nail condition/disease that is located in the treatment area(s) and might interfere with the diagnosis or evaluation of study parameters (i.e., atopic dermatitis, psoriasis, significant actinic damage, vitiligo, open wounds, infection, etc.). 5. Basal cell carcinoma within 6 months of Visit 1. 6. Uncontrolled systemic disease. 7. Foreseen unprotected and intense/excessive UV exposure during the course of the study. 8. Use of prohibited concomitant medications/procedures, as specified below in Table 2, during the study or within the defined washout periods. 9. Scheduled or planned surgical procedures during the course of the study. 10. Unable or unwilling to comply with any of the study requirements. 11. Medical or psychiatric conditions, or a personal situation, that may increase the risk associated with study participation or may interfere with interpretation of study results or subject compliance and, in the opinion of the PI, makes the subject inappropriate for study entry. 12. Clinically significant alcohol or drug abuse, or history of poor cooperation or unreliability. 13. Exposure to any other investigational drug/device within 30 days prior to study entry.