Thiamidol Explained
Isobutylamido thiazolyl resorcinol
Thiamidol faded melasma about as well as a prescription hydroquinone cream in a 3-month trial; it is used with daily sunscreen.
Label names (INCI): Isobutylamido Thiazolyl Resorcinol
Written by the Oliareen editorial teamDermatologist review: pendingHow we write
What it does
Blocks the human tyrosinase enzyme that makes pigment, fading melasma and dark spots.
Often discussed for
This doesn't mean everyone with these needs it.
Concerns
Skin types
How to approach it
If you're new to it
Start one new product at a time and patch test first: a little on the side of the jaw for a few days. Keep the rest of the routine simple.
General education, not a diagnosis or treatment plan.
Works well with
Examples of common pairings, not guaranteed combinations.
Use carefully with
Stacking several actives raises the risk of irritation. If you're on any prescribed medicine, ask your doctor before adding an active.
- Allergic rash in 8% of users in one trial; patch-test
Possible reactions
Stop if burning doesn't settle, or if you get a red rash, itching, swelling or peeling. Swelling of the face, lips or eyes, or trouble breathing, needs urgent medical care.
When to see a doctorEvidence and timing
- Evidence
- Evidence: moderate
- Time to see a change (weeks)
- 12
Evidence comes from studies of specific formulas and strengths. Your product may behave differently.