Iron oxides Explained
Tinted sunscreen
A tinted (iron oxide) sunscreen also blocks visible light; in a trial it improved melasma more than a regular sunscreen.
Label names (INCI): CI 77491, CI 77492, CI 77499, Iron Oxides
Written by the Oliareen editorial teamDermatologist review: pendingHow we write
What it does
Tint pigments that block visible light, which worsens melasma and dark marks on brown skin.
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.
- Choose a shade close to your skin
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)
- 4-8
Evidence comes from studies of specific formulas and strengths. Your product may behave differently.