Cosrx The Vitamin C 13 Serum 20 ML

The COSRX The Vitamin C 13 Serum is the gentler sibling in COSRX's vitamin C line — a 13% pure vitamin C serum designed as an accessible entry point for those not ready for the brand's stronger 23% version. It supports a brighter, more even-looking complexion while being easier to tolerate, making it a sensible first step into pure vitamin C for many skin types.

Why 13% is a smart starting point

Pure vitamin C (L-ascorbic acid) is the most studied form for supporting radiance, a more even tone, and antioxidant defence against daily environmental stress. Stronger concentrations can tingle and challenge the skin, which puts beginners off. At 13%, this serum offers a meaningful dose while being noticeably more approachable — a way to enjoy vitamin C's benefits without diving straight into the deep end.

Who it suits

This is a good match for most skin types curious about vitamin C, and especially for those who have found stronger serums too harsh. It is still an active, so very reactive skin should patch test first and introduce it slowly, but for most people it is a comfortable, everyday brightening step.

How to use it

Apply a few drops to clean skin in the morning, before moisturiser, then follow with sunscreen — vitamin C and daily SPF are natural partners, and sun protection matters all the more under Bangladesh's strong UV. Start a few mornings a week and build up as your skin adjusts. Avoid layering it with strong acids or retinol in the same routine step.

What to expect

Brightening is a gradual, consistency-driven process, so give this serum a steady few weeks. Used daily alongside reliable sun protection, it is an approachable, well-priced way to work toward a fresher, more even-looking complexion — and a comfortable bridge if you later want to step up to a higher concentration.

Check on Delivery: Inspect the product carefully when you receive your order. Packaging can vary between batches while the product remains the same original item.

Storage: Store in a cool, dry place away from direct sunlight. Keep out of reach of children. Check expiry date on packaging before use.

Patch Test: If you have sensitive skin, apply a small amount to your inner wrist and wait 24 hours before full use. Stop use if irritation occurs.