COSRX The Niacinamide 15 Serum (20ml) is a high-concentration,, specialized serum designed for total acne care, oil control, and pore refinement, particularly targeting oily, combination, and acne-prone skin. It features 15% Niacinamide to minimize skin imperfections and strengthen the skin barrier. 

Country of Origin: South Korea

Brief Description:

• Formula: Contains a high concentration of 15% Niacinamide (Vitamin B3) for maximum acne control.
• Key Ingredients:
• 15% Niacinamide: Regulates sebum, refines pores, and improves skin texture.
• Acetyl Glucosamine (NAG): Works with Niacinamide to fade post-acne marks and hyperpigmentation.
• Zinc PCA: Reduces sebum production and provides antibacterial effects.
• Allantoin: Soothes irritation and promotes collagen production.
• Texture: Lightweight, fast-absorbing gel.
• Best for: Oily, combination, and acne-prone skin types. 

How to use:

1. Cleanse and Tone: Start with a clean face.
2. Apply: Apply 2-3 drops of the serum, concentrating on areas with pores, blackheads, or excess oil.
3. Massage: Gently massage and tap into the skin for better absorption.
4. Layering: For daytime, follow with sunscreen (SPF 30+). 
5. Tips: Due to the high concentration, beginners should start using it every other day and build up to daily, or twice-daily, use. 

Customer Benefits:

• Total Acne Control: Effectively reduces acne (papules, pustules, cysts) and prevents future breakouts.
• Sebum and Pore Reduction: Significantly minimizes the appearance of enlarged pores and reduces excess oil/shine (clinical results show up to 50% improvement in oiliness).
• Fades Dark Spots: Helps to diminish post-acne marks, hyperpigmentation, and redness for a more even complexion.
• Smooths Texture: Improves rough skin texture and boosts radiance.
• Safe & Gentle: Despite the high strength, it is formulated to be non-comedogenic, fragrance-free, and suitable for sensitive skin.