Discoloration Correcting Serum
Reviewed by SerumTruth Editorial · Price and formula checked 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.
- Every active discloses its concentration
- Cheap to use, about $7 a month
- Evidence21 / 30
Strength of the research behind the key actives
- Tranexamic Acid: moderate evidence
- Niacinamide: moderate evidence
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
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.
Delivery tech plus packaging, and packaging only counts when actives are fragile.
- 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
Disclosure, active breadth, and current-generation or synergistic actives.
- 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
What a month of use costs: full marks at $6 a month or less, the floor at $60 a month or more.
Tap any row to see how its score was built.
Ranks #10 of 56 brightening serums we have scored.
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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
What the research says
In a 12 week trial, 3% topical tranexamic acid was linked with a more even looking skin tone, similar to a standard comparison cream.
Topical tranexamic acid as a promising treatment for melasma. Journal of Research in Medical Sciences, 2014. PubMed ↗
Topical 5% niacinamide was linked to more even looking skin tone, softer looking lines, and less visible blotchiness after 12 weeks.
Niacinamide: A B vitamin that improves aging facial skin appearance. Dermatologic Surgery, 2005. PubMed ↗
A study of the active, not this exact product. What matters for the score is whether this serum uses it at a comparable dose.
Higher-scoring alternatives
Same category, better SerumProof score. Worth a look before you buy.
Revision history
- July 11, 2026Price and formula rechecked
- July 10, 2026Review published
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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.