C + Collagen Brighten & Firm Vitamin C Serum
Reviewed by SerumTruth Editorial · Updated July 2026
A multi-form vitamin C aimed at the appearance of brightness and even tone, with niacinamide doing real supporting work. The stacked C derivatives read as thorough rather than fairy-dusted, but the undisclosed levels and prestige price are the trade. Pleasant to use and sensibly packaged.
- Evidence21 / 30
Strength of the research behind the key actives
- Ethyl Ascorbic Acid: moderate evidence
- Niacinamide: moderate evidence
- Score is the average of the key actives’ evidence grades.
- Potency21 / 25
Dosed at studied levels, not fairy-dusted
- Ethyl Ascorbic Acid: dosed at a studied level
- Niacinamide: dosed at a studied level
- Potency tracks how strongly the actives are dosed, led by the strongest, not how many there are.
- Delivery & stability16 / 20
Delivery tech + packaging that protects fragile actives
- Delivery: standard
- Packaging: airless, opaque
- No fragile actives here, so packaging barely moves the score.
- Formulation3 / 10
Disclosure, active breadth, and ingredient generation
- 0 of 2 actives disclose a concentration
- 2 key actives (breadth credit caps at 3)
- Current-generation or synergistic: Ethyl Ascorbic Acid
- Value6 / 15
What a month of use costs vs. the category
- About $47 per month to use
- $78 for 30 ml, used about twice a day (about 0.3 ml each time), so a bottle lasts about 1.7 months
- Band: $6/month or less earns full marks, $60/month or more hits the floor.
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What’s inside
| Active | Disclosed | Dose |
|---|---|---|
| Ethyl Ascorbic Acid | n/a | Studied |
| Niacinamide | n/a | Studied |
A gel-serum led by 3-O-ethyl ascorbic acid, a stable vitamin C derivative, high on the list with niacinamide just behind it, plus smaller amounts of L-ascorbic acid and THD ascorbate, in an opaque pump. It stacks several vitamin C forms alongside lactic acid and collagen amino acids, though none of the percentages are disclosed.
How it’s delivered
Air- and light-sensitive actives (vitamin C, copper peptides) lose potency fast in the wrong packaging, so delivery and the bottle are scored, not just what’s on the label.
The actives, explained
Cosmetic information for general education, not medical advice. The SerumProof score reflects our reading of publicly available research and formulation disclosures. See how scoring works.