As lunchtime approaches, the indoor heater's blast of air is making my face feel particularly parched. Swayed by the recent Olive Young sale, I made a few impulse purchases, but the one I was most excited about was a skin firming ampoule. I've been using it for a few days, carefully examining the ingredients. In winter, simple hydration alone isn't enough; the key is to fundamentally address the weakened skin barrier and sagging elasticity. The skin firming ampoule I chose this time contains a high-content peptide complex and adenosine, a MFDS-approved ingredient. Structurally, this combination is ideal for supporting collagen synthesis in the dermis. However, some emulsifiers and preservatives used to artificially boost absorption may cause mild irritation depending on skin condition. After applying this skin firming ampoule, I layer a drop of light facial oil to prevent the active ingredients from evaporating into the air. To be objective, rather than relying on popularity, it's crucial to objectively compare your skin concerns with the concentration of the product's active ingredients. While the end of the year may make you feel impatient about skincare, the right approach is to consistently use a single, functional product that prevents ingredient conflicts, rather than blindly layering on a multitude of highly nutritious products.