The Green Sciences Index: A Novel Approach for Assessing the Sustainability of Cosmetic Ingredients

The global necessity for sustainable development has prompted a significant re-evaluation of practices across diverse industries, notably influencing the cosmetic sector’s approach to ingredient management. To address this imperative, the L’Oréal Group launched its “Green Sciences” initiative, aiming to support the transition toward more sustainable cosmetic ingredients. This article introduces the Green Sciences Index (GSI), an assessment tool designed for a structured and standardized evaluation of cosmetic ingredient sustainability to assist innovators in selecting ingredients during the early stages of development. Adopting a life-cycle perspective, the proposed framework assesses feedstock origin, ingredient manufacturing processes, and the environmental impact of an ingredient’s end-of-life. The GSI was specifically designed with a focus on the global manufacturing pathway, from primary feedstocks to the final ingredients. It integrates an assessment framework inspired by the Principles of Green Chemistry for cosmetic ingredients, encouraging specific sustainable manufacturing practices, structured around “Biotechnology and Fermentation”, “Eco-extraction and Physical Processes”, and synthesis by “Green Chemistry”. The practical application of the GSI is demonstrated through a series of concrete case studies featuring diverse ingredients. The GSI is an eco-design lever serving as a pre-screening orientation tool at the ingredient level, complementing comprehensive Life Cycle Assessments to guide development and innovation toward more sustainable cosmetic products.