Isobutylamido Thiazolyl Resorcinol (also known as Thiamidol) is a resorcinol derivative that potently inhibits human tyrosinase to reduce melanin production. It is used to address hyperpigmentation, melasma, and uneven skin tone.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient skin irritation (stinging, redness) | Uncommon | Usually mild and resolves with continued use or reduced frequency. |
Dryness or flaking | Uncommon | More likely in higher concentrations or sensitive skin. |
Contact dermatitis / allergic sensitization | Rare | Reported infrequently; patch testing advisable for reactive skin. |
Itching | Rare | Generally transient and localized. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.