Cross-linked hyaluronic acid gel
DeviceThis intervention involves the injection of Alexa Medium, a sterile, cross-linked hyaluronic acid gel (17.5 mg/mL). The gel is administered into the mucous membrane of the lips for aesthetic restoration of lip volume loss. The product is supplied in a pre-filled 1 mL syringe and injected by a trained medical professional. One or two injections were administered per participant, with the second injection performed at the investigator's discretion at Visit 2. The device is manufactured by Diaco Biofarmaceutici S.r.l., Italy.