Stability studies are a mandatory requirement under Regulation (EC) No. 1223/2009 on cosmetic products, but their performance not only responds to legal requirements, but is an investment to ensure the quality and safety of the product throughout its life cycle, building consumer confidence and reinforcing the brand image.
ISO 18811 recognizes that, due to the diversity of cosmetic products and different storage conditions, it is not possible to establish a single stability assessment method. Therefore, it is the manufacturer’s responsibility to design and justify the most appropriate stability protocol for their product.
In this link you can read the article by Dr. Goya Análisis, published by Industria Cosmética magazine:
https://www.industriacosmetica.net/revista/numero-34-2024 Págs. 106-107