I like COSRX and bought a set, but I've gotten tired of it. I bought it from COSRX on Rakuten in November 2024. This serum contains high concentrations of retinol, which supports skin firmness and leads to smoother skin. It's a 0.1% stabilized retinol formula that can be used with peace of mind even by retinol beginners. The low irritation makes it suitable for daily use. It allows for authentic derma care at home. It is made in a special container to prevent oxidation. Recommended for those with poor makeup application, those with significant makeup breakdown, those with severely dry skin, those with sensitive skin who can't use other retinols due to irritation, and those who want more elasticity. This retinol cream leads to eggshell-like skin and elastic skin. - Product Name: The Retinol 0.1 - Ingredients: Super Vitamin E & Panthenol - Brand: COSRX - Contents: 30ml - How to Use: Recommended for nighttime use - Precautions: Patch test recommended for sensitive skin Thank you for looking.