What the brand claims
In the brand’s own words, quoted as written.
“Advanced The Vitamin C 23 Serum delivers a potent blend of 23% pure vitamin C, super vitamin E, and glutathione to help improve uneven skin tone and reduce visible signs of aging. Formulated for experienced users, it absorbs smoothly to support a more radiant, supple, and revitalized complexion.”
Quoted from the Cosrx product page
We quote these claims without judging them here — the verdict above weighs them against the evidence further down this page.
Ingredients38 ingredients
The full INCI list, as published by the brand.
Where to buy
What we've checked so far
We publish what we have while the assessment is still queued, and we're upfront about what's missing.
What we looked at
- Full INCI list, cross-checked against the brand's published formula.
- 90-day price history across 2 retailers, excluding shipping.
- 2,000 external ratings aggregated from review sites and retailers.
What we did not look at
- Our formula assessment — queued, not yet run.
- Shipping costs — not yet in all retailer feeds.
- Corol community reviews — none submitted yet.
What buyers say elsewhere
2,000 ratings from external review sites and retailers — scores only, we don't republish their words. Corol community reviews haven't started yet.
External average
4.3/ 5
2,000 ratings · not part of the verdict
Corol community reviews open here — be the first.
All 2 retailers
From €20.31 · Prices updated 4 days ago
° = over 3 days old