The Vitamin C 23 Serum — Reddit Reviews
by COSRX
6recommendationsacross 2 Reddit threads
Updated July 2, 2026
What the community says
A 23% vitamin C serum known in the k-beauty scene for brightening dull, hyperpigmented skin with a dewy finish but can be irritating for sensitive or dry skin types.
What people love
- High concentration of vitamin C for visible brightening and glow
- Generous bottle size with decent shelf life if refrigerated
- Strong presence in k-beauty routines with positive long-term user reports
Watch out for
- Too potent for sensitive skin — common reports of irritation and reactions
- Needs refrigeration to prevent oxidation and maintain efficacy
- Not ideal for dry skin due to potential for dryness or sensitivity
Product details
Concerns
Product Traits
Key Ingredients
Skin type data limited
Where to buy
Real Reddit threads
2 threads from r/koreanskincare
