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 | melasma 20%; papulopustular rosacea 15% | Moderate concern |
| Isobutylamido thiazolyl resorcinol | 🧪 Clinical evidence | melasma clinical 0.2% | Low concern |
| Tranexamic acid | 🧪 Clinical evidence | topical clinical 3%, 5% | Low concern |
| 4-Butylresorcinol | 🧪 Clinical evidence | clinical 0.1%, 0.3% | Low concern |
| Niacinamide | 🧪 Clinical evidence | clinical 2-5%; Korean notice whitening 2-5% | Low concern |
- Azelaic acidModerate concern
Studied at melasma 20%; papulopustular rosacea 15%
- Reference: Balina and Graupe, 1991
- Reference: DailyMed drug label, 2020
Pregnancy: not advised against on skin · Listed in 86 products
- Isobutylamido thiazolyl resorcinolLow concern
Studied at melasma clinical 0.2%
- Reference: Lima et al., 2021
- Reference: Lekhavat et al., 2026
Pregnancy: not rated yet · Listed in 5 products
- Tranexamic acidLow concern
Studied at topical clinical 3%, 5%
- Reference: Janney et al., 2019
Pregnancy: not rated yet · Listed in 452 products
- 4-ButylresorcinolLow concern
Studied at clinical 0.1%, 0.3%
- Reference: Huh et al., 2010
- Reference: Khemis et al., 2007
Pregnancy: not rated yet · Listed in 28 products
- NiacinamideLow concern
Studied at clinical 2-5%; Korean notice whitening 2-5%
- Reference: Bissett et al., 2004
- Reference: Draelos et al., 2006
- Reference: Kimball et al., 2010
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: not rated yet · Listed in 8,542 products
- N-Acetyl-D-glucosamineLow concern
Acetyl Glucosamine
Studied at clinical 2%
- Reference: Bissett et al., 2007
- Reference: Kimball et al., 2010
Pregnancy: not rated yet · Listed in 474 products
- Undecylenoyl PhenylalanineLow concern
Studied at clinical 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 10 products
- L-Ascorbic AcidLow concern
Ascorbic Acid
Studied at clinical 5%; photoprotection combination product 15%
- Reference: Humbert et al., 2003
- Reference: Espinal-Perez et al., 2004
- Reference: Murray et al., 2008
Pregnancy: not rated yet · Listed in 1,422 products
- Oxidized Glutathione (GSSG)Low concern
Oxidized Glutathione
Studied at clinical 2% w/w
- Reference: Watanabe et al., 2014
Pregnancy: not rated yet · Listed in 1 product
- Magnesium ascorbyl phosphateLow concern
Studied at Korean notice 3%; uncontrolled clinical 10%
- Reference: Kameyama et al., 1996
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: not rated yet · Listed in 191 products
- Ascorbyl Glucoside–Arginine ComplexLow concern
Studied at combination raw material clinical 28%; individual ingredient % N/A
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 clinical 1-2%; EU limit 1% face and hands
- Reference: Deo et al., 2013
- Reference: Lim, 1999
- Reference: European Union
Pregnancy: not rated yet · Listed in 85 products
- ArbutinModerate concern
Studied at Korean notice 2-5%; EU face limit 7%
- Reference: Korea Ministry of Government Legislation, 2023
- Reference: European Union
Pregnancy: not rated yet · Listed in 329 products
- Ascorbyl glucosideLow concern
Studied at Korean notice 2%; stand-alone clinical N/A
- Reference: Korea Ministry of Government Legislation, 2023
- Reference: Takada et al., 2024
Pregnancy: not rated yet · Listed in 621 products
- CysteamineLow concern
Studied at free base stand-alone N/A; study product cysteamine 5%, salt basis not confirmed
- 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
Studied at Korean notice 1-2%; stand-alone clinical N/A
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: not rated yet · Listed in 468 products
- alpha-ArbutinModerate concern
Studied at stand-alone clinical N/A; EU limit face 2%, body 0.5%
- Reference: European Union
Pregnancy: not rated yet · Listed in 165 products
- Ascorbyl tetraisopalmitateLow concern
Studied at Korean notice 2%; stand-alone clinical N/A
- Reference: Korea Ministry of Government Legislation, 2023
Pregnancy: not rated yet · Listed in 259 products
- GlabridinLow concern
Studied at N/A
- Reference: Cantelli et al., 2020
- Reference: Korea Ministry of Government Legislation, 2023
Listed in 2 products
- 4-(1-Phenylethyl)resorcinolLow concern
Phenylethyl Resorcinol
Studied at N/A
- Reference: Chatterjee et al., 2021
Listed in 28 products
- Tetrahexyldecyl ascorbateLow concern
Studied at stand-alone N/A; combination product 7% + LAA 10%
- Reference: Fitzpatrick and Rostan, 2002
Pregnancy: not rated yet · Listed in 280 products
- 4-HexylresorcinolLow concern
Hexylresorcinol
Studied at N/A
- Reference: Shariff et al., 2022
Listed in 41 products
- LiquiritinLow concern
Studied at N/A
- Reference: Amer and Metwalli, 2000
Not in our product list yet
- Cysteamine hydrochlorideLow concern
Cysteamine HCl
Studied at N/A; kept apart from free base 5%
- Reference: Mansouri et al., 2015
Pregnancy: advised to avoid · Listed in 1 product
- Nonapeptide-1Low concern
Studied at N/A
- Reference: Chatterjee et al., 2021
Pregnancy: not rated yet · Listed in 365 products
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 stand-alone comparison clinical 3-4%; 2% is a combination product
- 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 at combination clinical 2% + tretinoin 0.01%; stand-alone N/A
Evidence from a solar-lentigo combination drug. The score is attributed to the mequinol 2% + tretinoin 0.01% study, and the stand-alone effect size is not separated.
- Reference: Fleischer et al., 2000
Pregnancy: not rated yet · Not in our product list yet
Retinoic Acid
Studied at PIH clinical 0.1%; solar lentigo combination 0.01%
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 at combination drug 0.01%; stand-alone whitening N/A
The score is for a supporting role in short-term melasma combination treatment. This steroid is not recommended as a stand-alone whitening or everyday long-term soothing ingredient.
- Reference: DailyMed, 2024
Not in our product list 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.
Pregnant or breastfeeding? Check new products with your doctor or midwife.
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