Daily Sun Protection (Non-Negotiable): UV rays are one of the leading causes of lips darkening
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doi: 10.3389/fnut.2025.1686777 Received 15 August 2025 Revised 15 November 2025 Accepted 28 November 2025 Published 12 January 2026 Volume 12 - 2025 Edited by Andrea Orellana-Manzano, Escuela Superior Politcnica del Litoral (ESPOL), Ecuador Reviewed by Paulina Cerda Opazo, Autonomous University of Chile, Chile Aliakbar Fazaeli, Ardabil University of Medical Sciences, Iran Updates Copyright 2026 Garutti, de Scordilli, Alberti, Mazzeo, Michelotti, Fagioli, Del Conte, Casirati, Caccialanza, Bartolini and Puglisi
The N-terminal hexenoic acid modification requires specific analytical verification, which our third-party laboratory confirms for structural integrity on every production batch