Dr.Clinic Pore Tightening & Barrier-Strengthening Serum with 10% Niacinamide and 1% Zinc PCA. This serum strengthens the skin’s natural barrier while visibly minimizing the appearance of pores. It helps even out skin tone, leaving the complexion balanced and clearer. Its lightweight, fast-absorbing formula delivers deep hydration, leaving the skin feeling soft and refreshed. Suitable for all skin types and can be used daily for best results.