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Active Ingredients

Sulfur

硫磺

Also known as: Colloidal Sulfur

What it does

  • Antibacterial
  • Keratolytic
  • Anti-fungal
  • Oil reducing

Effective concentration

Minimum 2% Optimal 3-10%

OTC concentrations up to 10%. Higher may require prescription.

Evidence

Strong evidence

One of the oldest acne treatments. FDA-approved OTC acne ingredient.

Skin types

Well suited for: Oily Acne Prone
Use with caution: Sensitive Dry

Can be drying. Distinctive smell.

Helps with

Acne & Breakouts Fungal Acne Excess Oil
Irritation potential
Medium
Comedogenic rating
0 / 5
Pregnancy
Generally considered safe during pregnancy

Considered safe during pregnancy. Good acne treatment option for pregnant women.

Good to know

Old-school acne treatment that still works. Good pregnancy-safe option. Smells like eggs.

Related ingredients

Zinc PCA Niacinamide Retinol Salicylic Acid Adapalene Tretinoin

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Educational information only — not medical advice. Always patch test and consult a dermatologist for skin concerns.