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Sulfur

Sulfur — a mineral element with powerful keratolytic, antibacterial, and seboregulating action. A classic dermatocosmetic active ingredient against acne, used for over a century. It dries inflammatory elements and normalizes the work of sebaceous glands.

keratolyticantibacterialsebum controlacne
✓ Safe
Comedogenic Rating
0/5
Irritation Potential
0/5

What is it?

Sulfur (INCI: Sulfur) — a non-metallic chemical element (S) used in cosmetics in the form of colloidal sulfur (precipitated sulfur) — micronized particles for topical application. The mechanism of action is complex and partially not fully studied: keratolytic action through the formation of pentathionic acid upon contact with keratin → softening and exfoliation of the stratum corneum; antibacterial action against C. acnes (P. acnes) through the oxidation of sulfur compounds in the bacterial wall; sebostatic action — direct reduction of sebaceous gland activity. Concentrations: 2-10% in cosmetic formulations (FDA OTC acne monograph: 3-10%).

Acne and blackhead treatments, products for oily and problem skin, treatments for seborrheic dermatitis and dandruff, spot treatments.

Key Benefits

✦
Keratolytic action — exfoliation and cleansing of pores
Sulfur has pronounced keratolytic activity — softens and promotes the exfoliation of the upper stratum corneum of the skin. Mechanism: upon contact with keratin, sulfur forms compounds (pentathionic acid, hydrogen sulfide) → disruption of disulfide bonds in keratin → softening and facilitated exfoliation of corneocytes. Result: cleansing of pores from accumulated sebum and cells, prevention of comedones (black and whiteheads). Especially effective in combination with resorcinol (a classic dermatological formula against acne) or alone in spot treatments.
◈
Antibacterial action against Cutibacterium acnes
Sulfur exhibits direct antibacterial activity against Cutibacterium acnes (formerly Propionibacterium acnes) — the main bacterial factor in the pathogenesis of acne. Mechanism: oxidation of sulfur-containing amino acids in the bacterial cell wall → disruption of bacterial metabolism → bacteriostatic effect. Additionally: mild antifungal activity — used in seborrheic dermatitis (Malassezia furfur) and dandruff. Clinical history: sulfur is one of the oldest and most proven remedies against acne, with documented use since the late 1800s, before the advent of modern retinoids and antibiotics.
✧
Sebostatic action — control of sebum production
Sulfur demonstrates sebostatic (sebum-suppressing) activity — direct reduction of sebaceous gland activity with regular use. The mechanism is not precisely established, but the clinically confirmed effect: reduction of oily shine, control of excess sebum in oily and acne-prone skin. The combined effect (keratolytic + antibacterial + sebostatic) makes sulfur one of the most multifunctional classic anti-acne actives. Often combined with: salicylic acid, zinc, niacinamide for enhanced anti-acne effect.

Suitable for

oily and problem skinskin with acne and blackheadsscalp skin with dandruff

Main Actions

✓ keratolytic pore cleansing✓ antibacterial action against C. acnes✓ sebostatic control of sebum production
Sulfur: smell and irritation

Sulfur has a characteristic smell (sulfurous taste) — partially masked by fragrances in formulations. It may cause dryness and irritation at concentrations >5% — start with low concentrations (2-3%). The FDA OTC acne monograph allows 3-10% sulfur as an active ingredient against acne. INCI: Sulfur (or Colloidal Sulfur, Precipitated Sulfur). Do not combine with benzoyl peroxide in one application (possible increased irritation). Avoid in case of known allergy to sulfur.

Frequently Asked Questions

What does Sulfur do for skin?
Acne and blackhead treatments, products for oily and problem skin, treatments for seborrheic dermatitis and dandruff, spot treatments.
Who should use Sulfur?
Sulfur is suitable for: oily and problem skin, skin with acne and blackheads, scalp skin with dandruff.
Are there any warnings about Sulfur?
Sulfur has a characteristic smell (sulfurous taste) — partially masked by fragrances in formulations. It may cause dryness and irritation at concentrations >5% — start with low concentrations (2-3%). The FDA OTC acne monograph allows 3-10% sulfur as an active ingredient against a

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