[Pore-Refining Retinol Serum for Beginners] This fast-absorbing, gentle Blue Bio-Retinol delivers powerful pore-minimizing effect and improves skin texture with less irritation than traditional yellow retinol, making it thoughtfully designed for retinol beginners. [Key Ingredients] Formulated with Blue Bio-Retinol + 10% Niacinamide, this powerful duo works in perfect synergy to refine the skin and soften the appearance of fine lines. Blue Bio-Retinol combines a gentle, bio-based retinol with encapsulated pure retinol to minimize irritation while tightening pores, fading dark spots, and reducing the appreance of fine lines. Niacinamide enhances the effects of retinol by improving texture and promoting a visibly smoother, healthier-looking complexion. [Clinically Tested] Clinically proven to improve 10 key pore-related concerns—including size, depth, and volume—while strengthening the skin barrier and visibly enhancing pore tightness. [Recommended For] Suitable for all skin types, including sensitive skin. Ideal for those concerned with enlarged pores, overall skin recovery, or sensitivity to traditional retinol products. [numbuzin 3, How to Use] Use daily, both morning and night. Be sure to use sun protection during the day after applying this product.