What are the best vitamin C serums?
Serums & AmpoulesNamed in 1 of 6 answers
#18
8.0
Rank by surface
Gemini#10
Gemini#10Brand profile
COSRX The Vitamin C 23 Serum
A highly concentrated vitamin C serum from South Korean brand COSRX, featuring 23% pure L-Ascorbic Acid to target dark spots and improve skin tone.
1 questions · 1 categories · As of Nov 1, 2026
- Questions
- 1
- 1 categories
- Answers naming it
- 1/6
- Of the answers measured on this brand's questions
Visibility by category
| Categories | Category rank | Questions | Score |
|---|---|---|---|
| Serums & Ampoules | - | 1 | 8.0 |
Ranking by question
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Sites the answers naming this brand cited in the last four weeks. Counts are citing answers.
The answers that named this brand cited no sources in the last four weeks.
Named by surface, by question
For the brand's best questions: of each surface's 1 answers, how many named it.
| Questions |  Google AI Overviews |  ChatGPT |  Claude | Gemini | Google AI Mode |  Microsoft Copilot |
|---|---|---|---|---|---|---|
| 1What are the best vitamin C serums? | 0 | 0 | 0 | 1 | 0 | 0 |