COSRX vitamin c 23 serum 20g brightening booster

Introduction — cosrx vitamin c 23 serum

cosrx vitamin c 23 serum is a high potency yet balanced booster that targets dull tone and early lines with 23 percent pure ascorbic acid. The two layer system places a light oil over the serum to slow oxidation and leave a dewy finish. The bottle holds 20 ml for daily use, and the texture sinks in fast.

Key benefits — cosrx vitamin c 23 serum

Regular use helps brighten spots, refine roughness, and support elasticity. Fine lines look softer while the surface feels smoother and bouncier. Because the base includes humectants and emollients, hydration rises without heaviness. Therefore, makeup applies evenly and the glow lasts through the day.

Capacity — cosrx vitamin c 23 serum

The bottle contains 20 ml, also known as 0.67 fl oz. This amount suits a routine that uses a few drops per application. With steady use, a bottle typically lasts several weeks. Keep usage consistent to support tone, texture, and clarity gains.

Ingredients — cosrx vitamin c 23 serum

Key components include 23 percent L ascorbic acid, super vitamin e known as tocotrienols, hyaluronic acid, panthenol, niacinamide, adenosine, squalane, caffeine, glutathione, acetyl glucosamine, and allantoin. Supporting agents include dimethicone for glide, tromethamine, disodium edta, and a blend of seed oils and botanical extracts for comfort.

This system keeps the formula fresh and effective. The serum has a natural yellow tint from vitamin c and antioxidants. The scent may seem coppery due to pure ascorbic acid and is normal. Additionally, the light oil layer improves spread and cushions skin while helping protect the water phase.

How to use — cosrx vitamin c 23 serum

After cleansing, during the serum step, shake the bottle gently from side to side. Apply a few drops to face and neck, then press until absorbed. Use in the morning or evening. If used in the morning, finish with a broad spectrum sunscreen of at least spf thirty.

For pairing, avoid layering another high strength vitamin c or strong niacinamide in the same routine if your skin is sensitive. Instead, alternate by time of day or on different days. Patch test before first use and avoid broken skin. Discontinue use if persistent irritation occurs.

Storage notes — cosrx vitamin c 23 serum

Keep the bottle upright and refrigerated between three and ten degrees celsius after opening. Use within two months for best freshness. Do not shake hard before first use, and attach the included dropper. Store away from heat and direct light to reduce oxidation and color change.