Cosrx The Vitamin C 23 Serum

COSRX Advanced The Vitamin C 23 Serum contains 23% pure Vitamin C (Ascorbic Acid), making it a high-strength brightening serum for dull skin, dark spots, uneven tone, and visible signs of aging.

Key Ingredients

• Pure Vitamin C (23%): Brightens dull-looking skin and improves the appearance of dark spots, uneven tone, and skin texture.
• Super Vitamin E: Provides antioxidant support and complements Vitamin C in the formula.
• Glutathione: Adds another antioxidant to the brightening-focused formula.
• Hyaluronic Acid: Keeps the skin hydrated while using a high-strength active.
• Panthenol: Moisturizes and soothes the skin.
• Adenosine: Supports the formula’s focus on visible signs of aging.

What Can It Help With?

• Dark Spots: Vitamin C helps reduce pigmentation and discoloration with consistent use.
• Dull Skin: Helps bring back a brighter, more radiant-looking complexion.
• Uneven Skin Tone: Promotes a clearer, more even-looking appearance.
• Fine Lines: The formula is also designed to reduce signs of aging and improve skin texture.
• Visible Pores: Reduces the appearance of pores.

What Does It Feel Like?

The serum has a fluid, slightly oily texture. Because of its high Vitamin C concentration, some people find it lightweight and quick to absorb, while others notice a tacky or richer finish. Using a small amount can make it easier to spread and layer with the rest of your routine.

Good to Know

• 23% pure Vitamin C makes this a high-strength serum, so it isn’t necessarily the best starting point for someone new to Vitamin C.
• If you’re using a strong Vitamin C product for the first time, start gradually and patch test first.
• COSRX lists a 2-month period for usage after opening, so keep the bottle properly closed and follow the product’s storage instructions.
• The serum may also cause temporary tingling, particularly on sensitive or already irritated skin.
• Because this is a high-strength Vitamin C formula, we recommend avoiding it in the same routine as high-concentration retinol or copper peptide products; these can be used at different times instead.

How to Use COSRX Advanced The Vitamin C 23 Serum?

1. After cleansing and toning, apply 2–3 drops to the face and gently pat until absorbed.
2. Follow with moisturizer and SPF during the day.