Discoloration Correcting Serum
Reviewed by SerumTruth Editorial · Updated July 2026
A well-chosen brightening pair at a budget price, aimed at the appearance of an even tone and post-blemish marks. The undisclosed percentages are the one knock, and tranexamic acid is a slow, patient active rather than a quick fix. For the money it is a smart place to start on discoloration.
- Evidence21 / 30
Strength of the research behind the key actives
- Tranexamic 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
- Tranexamic Acid (2%): dosed at a studied level
- Niacinamide (4%): dosed at a studied level
- Potency tracks how strongly the actives are dosed, led by the strongest, not how many there are.
- Delivery & stability14 / 20
Delivery tech + packaging that protects fragile actives
- Delivery: standard
- Packaging: clear dropper
- No fragile actives here, so packaging barely moves the score.
- Formulation8 / 10
Disclosure, active breadth, and ingredient generation
- 2 of 2 actives disclose a concentration
- 2 key actives (breadth credit caps at 3)
- Current-generation or synergistic: Tranexamic Acid
- Value15 / 15
What a month of use costs vs. the category
- About $7 per month to use
- $12 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 |
|---|---|---|
| Tranexamic Acid | 2% | Studied |
| Niacinamide | 4% | Studied |
Tranexamic acid (2%) paired with niacinamide (4%), a combination that targets the appearance of stubborn discoloration from two different angles, in a plain glass dropper. Good Molecules does not disclose the exact percentages, but the pairing is a sensible one and both actives are stable and easy to layer. Nothing here is fragile, so the dropper is a non-issue.
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.