Effect of a New HA Filler in Correcting Nasolabial Fold

Inclusion Criteria: * Patients who had prominent NLFs with a WSRS score of 3 or 4 on both sides Exclusion Criteria: * patients with active facial skin diseases or history of severe allergies, autoimmune disorders, or hypersensitivity to HA or any of the excipients contained in the investigational filler * participants who had used a local topical preparation (steroid and retinoid) within 2 weeks before the study * participants who had undergone chemical peeling, laser procedures, or acne treatments within 4 months before the study * participants who had been injected with other biomaterials, including HA within 6 months before the study.