brightening agent
Potent, reversible inhibitor of human tyrosinase (more selective for the human enzyme than kojic/arbutin). Proprietary Beiersdorf actives with company-sponsored RCTs for melasma and UV-induced pigmentation.
| Concern | Strength | Studies | What the research says |
|---|---|---|---|
| Dark spots & hyperpigmentation | Excellent | 3 | Mar 2024 systematic review identified n=3 UV-induced hyperpigmentation studies all demonstrating statistically significant improvements. Schmidt et al 2020 (EADV Congress) 12-week randomized split-face study of skin… |
| Post-acne marks | Excellent | — | Roggenkamp 2021 (J Eur Acad Dermatol Venereol PMID 33559186 VERIFIED) comprehensive PIH study program included: (1) suction blister-induced PIH 3-month treatment — thiamidol-treated sites significantly lighter than… |
No known conflicts — Thiamidol isn’t flagged against any concern or skin condition.
Strength reflects the ingredient’s effect on each concern; study counts match research whose findings relate to that concern.
Thiamidol is a brightening agent backed by a moderate body of supporting evidence (evidence tier 2 of 4). We track 8 studies for it, 5 reporting a positive effect.
Journal of Drugs in Dermatology · 2024 · systematic review
Systematic review: ALL 14 clinical studies found thiamidol to provide statistically significant improvements to hyperpigmentation conditions; consistent efficacy across facial hyperpigmentation melasma PIH and UV induced hyperpigmentation indications.
The Journal of Dermatology · 2021 · rct · n=48
Randomized controlled trial (n=48, 24 weeks): Clinical photography and MASI improved significantly with Thiamidol vs baseline p<0.001 and vs vehicle p<0.001 to 0.043 at all time points up to treatment end; well tolerated; regression phase showed MASI still significantly lower than baseline but similar for treatment and vehicle groups indicating maintenance treatment required.
International Journal of Cosmetic Science · 2021 · rct
Randomized controlled trial: Suction blister PIH sites treated with thiamidol significantly lighter than control at 2 weeks and improved throughout 12 weeks; acne related PIH vehicle controlled RCT demonstrated significant thiamidol efficacy; 12 week three product thiamidol observational study confirmed efficacy.
EADV Congress 2020 · 2020 · rct
Randomized controlled trial: Serum containing HA plus arctiin plus thiamidol reduced both age spots and wrinkles and increased elasticity of mature skin.
Journal of Investigative Dermatology · 2018 · in vitro
In-vitro/mechanistic study: Thiamidol isobutylamido thiazolyl resorcinol identified as most potent inhibitor of human tyrosinase from 50000 compounds screened; thiamidol IC50 1.1 uM on human tyrosinase vs hydroquinone IC50 greater than 4000 uM vs alpha arbutin IC50 in millimolar range vs kojic acid IC50 greater than 400 uM; thiamidol IC50 108 uM on mushroom tyrosinase demonstrating greater than 98x selectivity for human vs mushroom tyrosinase; melanocyte culture IC50 0.9 uM reversibly inhibits melanin production vs hydroquinone 16.3 uM irreversible inhibition via cytotoxicity.
Dermatologic Clinics · 2025 · review
Review: Recent 2025 dermatology specialist review positioning thiamidol as breakthrough innovation in hyperpigmentation treatment; discusses Kligman alternative combination with tretinoin and dexamethasone.
+ 2 more studies in our evidence base.
In 28 products — most often serums (14), moisturizers (9), sunscreens (3), from $22.86 to $424.18. Set up a profile to rank these for your skin. Click any product to learn more.
Eucerin
Radiant Tone Eye Cream Dark Circle Corrector
Eye Cream
$34.9914.8ml · $2.36/ml
Ideal for
Not recommended for
Eucerin
Radiant Tone Eye Cream Dark Circle Corrector
Eye Cream
$34.9914.8ml · $2.36/ml
Ideal for
Not recommended for
Radiant Tone Eye Cream Dark Circle Corrector is a eye cream by Eucerin. Key ingredients include Water, Glycerin, Caprylic/Capric Triglyceride.
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Eucerin
Eucerin Sun Face Pigment Control SPF50+ 50ml
Serum
$22.8650ml · $0.46/ml
Ideal for
Not recommended for
Eucerin
Eucerin Sun Face Pigment Control SPF50+ 50ml
Serum
$22.8650ml · $0.46/ml
Ideal for
Not recommended for
Eucerin Sun Face Pigment Control SPF50+ 50ml is a brightening serum by Eucerin. Key ingredients include Water, Alcohol Denat, Avobenzone.
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Set up your skin profileEucerin
Eucerin Radiant Tone Night Cream Dark Spot Corrector
Moisturizer – for brightening, Dryness
$34.99
Ideal for
Not recommended for
Eucerin
Eucerin Radiant Tone Night Cream Dark Spot Corrector
Moisturizer – for brightening, Dryness
$34.99
Ideal for
Not recommended for
Eucerin Radiant Tone Night Cream Dark Spot Corrector is a acne treatment by Eucerin. Key ingredients include Water, Glycerin, Alcohol Denat.
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Eucerin
Eucerin Anti-Pigment Skin Perfecting Serum 30ml
Serum
$56.5830ml · $1.89/ml
Ideal for
Not recommended for
Eucerin
Eucerin Anti-Pigment Skin Perfecting Serum 30ml
Serum
$56.5830ml · $1.89/ml
Ideal for
Not recommended for
Eucerin Anti-Pigment Skin Perfecting Serum 30ml is a brightening serum by Eucerin. Key ingredients include Water, Glycerin, Alcohol Denat.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileEucerin
Radiant Tone Dual Serum Dark Spot Corrector
Serum
$44.9929.6ml · $1.52/ml
Ideal for
Not recommended for
Eucerin
Radiant Tone Dual Serum Dark Spot Corrector
Serum
$44.9929.6ml · $1.52/ml
Ideal for
Not recommended for
Radiant Tone Dual Serum Dark Spot Corrector is a antioxidant serum by Eucerin. Key ingredients include Water, Alcohol Denat, Butylene Glycol.
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Eucerin
Eucerin Dermopure Sérum Triple Action
Serum – for Acne & breakouts, Blackheads
$26.6740ml · $0.67/ml
Ideal for
Not recommended for
Eucerin
Eucerin Dermopure Sérum Triple Action
Serum – for Acne & breakouts, Blackheads
$26.6740ml · $0.67/ml
Ideal for
Not recommended for
Eucerin Dermopure Sérum Triple Action is a exfoliant by Eucerin. Key ingredients include Water, Alcohol Denat, Glycerin.
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Eucerin
Eucerin Hyaluron-Filler+Elasticity Ultra-Light Day Care SPF50 50ml
Serum
$48.2650ml · $0.96/ml
Ideal for
Not recommended for
Eucerin
Eucerin Hyaluron-Filler+Elasticity Ultra-Light Day Care SPF50 50ml
Serum
$48.2650ml · $0.96/ml
Ideal for
Not recommended for
Eucerin Hyaluron-Filler+Elasticity Ultra-Light Day Care SPF50 50ml is a brightening serum by Eucerin. Key ingredients include Water, Alcohol Denat, C12-15 Alkyl Benzoate.
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Eucerin
Eucerin Anti-Pigment Day Cream Spf30
Moisturizer – for brightening, Dryness
$48.2650ml · $0.96/ml
Ideal for
Not recommended for
Eucerin
Eucerin Anti-Pigment Day Cream Spf30
Moisturizer – for brightening, Dryness
$48.2650ml · $0.96/ml
Ideal for
Not recommended for
Eucerin Anti-Pigment Day Cream Spf30 is a spf moisturiser by Eucerin. Key ingredients include Alcohol Denat, Water, Bemotrizinol.
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Eucerin
Eucerin Anti-Pigment Spot Corrector
Serum – for Dryness, sensitivity
$33.025ml · $6.60/ml
Ideal for
Not recommended for
Eucerin
Eucerin Anti-Pigment Spot Corrector
Serum – for Dryness, sensitivity
$33.025ml · $6.60/ml
Ideal for
Not recommended for
Eucerin Anti-Pigment Spot Corrector is a brightening serum by Eucerin. Key ingredients include Alcohol Denat, Water, Glycerin.
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Eucerin
Eucerin Hyaluron-Filler Elasticity 3D Serum 30ml
Serum
$42.8630ml · $1.43/ml
Ideal for
Not recommended for
Eucerin
Eucerin Hyaluron-Filler Elasticity 3D Serum 30ml
Serum
$42.8630ml · $1.43/ml
Ideal for
Not recommended for
Eucerin Hyaluron-Filler Elasticity 3D Serum 30ml is a brightening serum by Eucerin. Key ingredients include Water, Glycerin, Octocrylene.
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Set up your skin profileEducational information, not medical advice. Study findings summarise the cited research and may not reflect every formulation.