Ingredient glossary
Thiamidol
On your shelf ✓What Thiamidol does for your skin, who it suits, and what to watch for.
INCI: Isobutylamido Thiazolyl Resorcinol
In short: Thiamidol delivers brightening and antioxidant, suits most skin types, and the evidence behind it is strong. One thing to know: clear it with your doctor if pregnant; introduce it gently.
- What it does
- Brightening, antioxidant
- Best for
- Most skin types
- Watch out
- Clear it with your doctor if pregnant; introduce it gently
- Evidence
- Strong
The molecule
The Glow take
One of the ingredients I trust most.
When your goal is fading dark spots and evening out tone, Thiamidol delivers, and the research properly backs it up. Introduce it gently, and pair it with something soothing if your skin runs sensitive.
— Maya
What it does
- brightening
- antioxidant
strong evidenceA twenty four week randomized double blind study showed daily thiamidol-containing serum and care products produced significant MASI reductions and melasma improvement versus vehicle with sustained benefit after treatment.
On a label: usually effective at 0.1-0.3%.
Who it's for, and who should skip it
Tends to suit
- pigmentation
- melasma
- postinflammatory hyperpigmentation
- normal
- combo
- oily
Approach with care
- very sensitive
- compromised barrier
- pregnancy
- Clogs poresLow
- Irritation riskModerate
How it fits each skin type
- DrySuits
- CombinationSuits
- OilySuits
- SensitiveTake care
Often chosen for pigmentation, melasma, postinflammatory hyperpigmentation. Take extra care if any of these apply to you: compromised barrier, pregnancy.
Where it fits in your routine
Plays well with
- sunscreens
- vitamin c
- niacinamide
Thiamidol, answered
Is Thiamidol safe during pregnancy?
Clear it with your doctor first. Thiamidol is flagged as use-with-caution during pregnancy and breastfeeding, so check with your doctor or midwife before adding it.
Who should avoid Thiamidol?
Approach Thiamidol with care if any of these apply to you: very sensitive, compromised barrier, and pregnancy. Its irritation risk is moderate, so introduce it slowly and patch test first.
What concentration of Thiamidol actually works?
Thiamidol tends to do its job in the 0.1 to 0.3% range. Much lower and it is likely underdosed.
During pregnancy
Treat Thiamidol as a maybe rather than a yes for now. It is flagged as one to use with caution while pregnant or breastfeeding, so it is worth clearing before you carry on.
When in doubt, check with your doctor or midwife. They outrank any website, including this one.
Compare Thiamidol with
Can you mix Thiamidol with
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