Skincare ingredients for dark spots and hyperpigmentation
Our research data links 29 ingredients to dark spots and hyperpigmentation. Strongest evidence comes first, each with the studies behind it.
A research list, not medical advice. If a skin condition worries you, see a dermatologist.
Which ingredients have the most evidence for dark spots and hyperpigmentation?
In our data, the strongest evidence for dark spots and hyperpigmentation is behind Azelaic acid, Isobutylamido thiazolyl resorcinol, and Tranexamic acid.
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| Ingredient | Evidence | Studied at | Rating |
|---|---|---|---|
| Azelaic acid | 🧪 Clinical evidence | Study dose: not found yet | Moderate concern |
| Isobutylamido thiazolyl resorcinol | 🧪 Clinical evidence | 0.2% | Low concern |
| Tranexamic acid | 🧪 Clinical evidence | 3%, 5% | Low concern |
| 4-Butylresorcinol | 🧪 Clinical evidence | 0.1%, 0.3% | Low concern |
| Niacinamide | 🧪 Clinical evidence | 2-5% | Low concern |
- Azelaic acidModerate concern
Study dose: not found yet
- Reference: Balina and Graupe, 1991
- Reference: DailyMed drug label, 2020
Pregnancy: use with care · Listed in 89 products
- Isobutylamido thiazolyl resorcinolLow concern
Studied at 0.2%
- Reference: Lima et al., 2021
- Reference: Lekhavat et al., 2026
Pregnancy: – · Listed in 10 products
- Tranexamic acidLow concern
Studied at 3%, 5%
- Reference: Janney et al., 2019
Pregnancy: – · Listed in 767 products
- 4-ButylresorcinolLow concern
Studied at 0.1%, 0.3%
- Reference: Huh et al., 2010
- Reference: Khemis et al., 2007
Pregnancy: – · Listed in 39 products
- NiacinamideLow concern
Studied at 2-5%
- Korea approved amount: 2-5%
A limit is the most a product may hold, not the amount that works.
- Reference: Bissett et al., 2004
- Reference: Draelos et al., 2006
- Reference: Kimball et al., 2010
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: – · Listed in 12,904 products
- N-Acetyl-D-glucosamineLow concern
Acetyl Glucosamine
Studied at 2%
- Reference: Bissett et al., 2007
- Reference: Kimball et al., 2010
Pregnancy: – · Listed in 603 products
- Undecylenoyl PhenylalanineLow concern
Studied at 2%
Vehicle-controlled in solar lentigines of the hands; the same effect cannot be promised for facial melasma and freckles.
- Reference: Katoulis et al., 2010
Listed in 12 products
- L-Ascorbic AcidLow concern
Ascorbic Acid
Studied at 5%
- Reference: Humbert et al., 2003
- Reference: Espinal-Perez et al., 2004
- Reference: Murray et al., 2008
Pregnancy: – · Listed in 2,002 products
- Oxidized Glutathione (GSSG)Low concern
Oxidized Glutathione
Studied at 2%
- Reference: Watanabe et al., 2014
Pregnancy: – · Listed in 1 product
- Magnesium ascorbyl phosphateLow concern
Studied at 10% (uncontrolled)
- Korea approved amount: 3%
A limit is the most a product may hold, not the amount that works.
- Reference: Kameyama et al., 1996
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: – · Listed in 252 products
- Ascorbyl Glucoside–Arginine ComplexLow concern
Studied only mixed with other actives
A small solar-lentigo study. The ingredient composition is unclear, so it cannot be broken down into the effects of pure AG and arginine separately.
- Reference: Takada et al., 2024
Not in our product list yet
- Kojic acidModerate concern
Studied at 1-2%
- EU limit: up to 1% (face and hands)
A limit is the most a product may hold, not the amount that works.
- Reference: Deo et al., 2013
- Reference: Lim, 1999
- Reference: European Union
Pregnancy: – · Listed in 96 products
- ArbutinModerate concern
Study dose: not found yet
- Korea approved amount: 2-5%
- EU limit: up to 7% (face)
A limit is the most a product may hold, not the amount that works.
- Reference: Korea Ministry of Government Legislation, 2023
- Reference: European Union
Pregnancy: – · Listed in 478 products
- Ascorbyl glucosideLow concern
Study dose: not found yet
- Korea approved amount: 2%
A limit is the most a product may hold, not the amount that works.
- Reference: Korea Ministry of Government Legislation, 2023
- Reference: Takada et al., 2024
Pregnancy: – · Listed in 784 products
- CysteamineLow concern
Study dose: not found yet
- Reference: Mansouri et al., 2015
Pregnancy: advised to avoid · Not in our product list yet
- 3-O-Ethyl-L-Ascorbic AcidLow concern
3-O-Ethyl Ascorbic Acid
Study dose: not found yet
- Korea approved amount: 1-2%
A limit is the most a product may hold, not the amount that works.
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: – · Listed in 651 products
- alpha-ArbutinModerate concern
Study dose: not found yet
- EU limit: up to 2% (face)
- EU limit: up to 0.5% (body)
A limit is the most a product may hold, not the amount that works.
- Reference: European Union
Pregnancy: – · Listed in 224 products
- Ascorbyl tetraisopalmitateLow concern
Study dose: not found yet
- Korea approved amount: 2%
A limit is the most a product may hold, not the amount that works.
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: – · Listed in 345 products
- GlabridinLow concern
Study dose: not found yet
- Reference: Cantelli et al., 2020
- Reference: Korea Ministry of Government Legislation, 2023
Listed in 2 products
- 4-(1-Phenylethyl)resorcinolLow concern
Phenylethyl Resorcinol
Study dose: not found yet
- Reference: Chatterjee et al., 2021
Listed in 36 products
- Tetrahexyldecyl ascorbateLow concern
Studied only mixed with other actives
- Reference: Fitzpatrick and Rostan, 2002
Pregnancy: – · Listed in 300 products
- 4-HexylresorcinolLow concern
Hexylresorcinol
Study dose: not found yet
- Reference: Shariff et al., 2022
Listed in 57 products
- LiquiritinLow concern
Study dose: not found yet
- Reference: Amer and Metwalli, 2000
Not in our product list yet
- Cysteamine hydrochlorideLow concern
Cysteamine HCl
Study dose: not found yet
- Reference: Mansouri et al., 2015
Pregnancy: advised to avoid · Listed in 1 product
- Nonapeptide-1Low concern
Study dose: not found yet
- Reference: Chatterjee et al., 2021
Pregnancy: – · Listed in 648 products
– = no pregnancy research data yet
Which ingredients for dark spots and hyperpigmentation need a doctor?
4 ingredients here are prescription-only or for in-clinic use in the US. We list them so you can look them up; they never go into a PERBETE routine.
Studied at 3-4%
- Reference: Balina and Graupe, 1991
- Reference: Espinal-Perez et al., 2004
- Reference: Janney et al., 2019
- Reference: Lim, 1999
Pregnancy: advised to avoid · Listed in 1 product
p-Hydroxyanisole
Studied only mixed with other actives
Evidence comes from a combination drug for solar lentigines (sun spots). This row uses only the result of the mequinol 2% + tretinoin 0.01% combination. The same trials also had a group for each ingredient alone and a vehicle group, and the combination did better than each alone (on the face in one trial there was no clear difference from tretinoin alone).
- Reference: Fleischer et al., 2000
Pregnancy: – · Not in our product list yet
Retinoic Acid
Studied at 0.1%
Regulates epidermal turnover, including pigment. Irritation needs to be managed according to prescription and formulation.
- Reference: Bulengo-Ransby et al., 1993
- Reference: Fleischer et al., 2000
Pregnancy: advised to avoid · Not in our product list yet
Studied only mixed with other actives
Seen as a supporting part of short-term melasma combination treatment. This steroid is not recommended as a stand-alone brightening ingredient or an everyday long-term soothing one.
- Reference: DailyMed, 2024
Not in our product list yet
– = no pregnancy research data yet
Which ingredients for dark spots and hyperpigmentation are advised against in pregnancy?
In our data, pregnancy guidance advises avoiding Hydroquinone, All-trans-Retinoic Acid (Tretinoin), Cysteamine, and Cysteamine hydrochloride. Each ingredient page names the source.
Use with care (the reason is on each ingredient page): Azelaic acid.
Pregnant or breastfeeding? Check new products with your doctor or midwife.
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