Ingredient glossary

Mexoryl SX

What Mexoryl SX does for your skin, who it suits, and what to watch for.

INCI: Ecamsule

Sun protection

In short: Mexoryl SX delivers uva protection, suits most skin types, and the evidence behind it is strong.

What it does
Uva protection
Best for
Most skin types
Evidence
Strong
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The molecule

Tap to enlarge
Chemical structure of Mexoryl SX (Ecamsule)

The Glow take

Only as good as the sunscreen it lives in.

As a single filter, Mexoryl SX only matters as part of a finished sunscreen you actually reapply. The best SPF is the one that feels good enough to wear every morning.

— Maya

What it does

  • uva protection

strong evidenceClinical sunscreen trials and regulatory data show Mexoryl SX maintains high UVA absorbance with minimal degradation and improves UVA protection indices in finished products.

On a label: usually effective at 3-10%.

Who it's for, and who should skip it

Tends to suit

  • all

Approach with care

No specific group flagged to avoid it.

  • Clogs poresLow
  • Irritation riskLow

How it fits each skin type

  • DrySuits
  • CombinationSuits
  • OilySuits
  • SensitiveSuits

Where it fits in your routine

WhenMorning
Where in the orderThe last step, over everything else

Plays well with

  • uv filters
  • antioxidants

Mexoryl SX, answered

Is Mexoryl SX safe during pregnancy?

Yes. Mexoryl SX is considered safe to use during pregnancy and breastfeeding. As with anything, if you are unsure it is worth a quick word with your doctor or midwife.

Who should avoid Mexoryl SX?

No specific group is flagged to avoid Mexoryl SX. It is well tolerated by most skin. Still, introduce anything new one product at a time.

What concentration of Mexoryl SX actually works?

Mexoryl SX tends to do its job in the 3 to 10% range. Much lower and it is likely underdosed.

This, for every label you own

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Sources & how we reviewed this

Last reviewed July 2026. Educational information about a cosmetic ingredient, not medical advice.