Sulfur in Acne Skincare — An Effective Ingredient or a Relic?

Sulfur in cosmetics — an ingredient with a long history

Sulfur (listed as Sulfur on the INCI list) is one of the oldest ingredients used in dermatology. The ancient Egyptians and Greeks already used sulfur-based preparations to treat skin conditions. Even though modern cosmetology offers plenty of cutting-edge solutions, sulfur still holds an important place in the anti-acne arsenal.

But in the era of retinoids, AHA/BHA acids and niacinamide, does sulfur still make sense? The answer isn't clear-cut — and that's exactly why it's worth taking a closer look.

How does sulfur work on acne?

Sulfur acts on acne-prone skin in several ways at once, thanks to a number of mechanisms:

• Keratolytic action: sulfur helps remove dead skin cells, preventing clogged pores. It works much like salicylic acid, though more gently.
• Antibacterial action: sulfur inhibits the growth of Cutibacterium acnes (formerly Propionibacterium acnes) bacteria, which play a key role in the formation of inflammatory lesions.
• Sebum regulation: sulfur helps absorb excess sebum, which matters a great deal for oily skin.
• Anti-inflammatory action: it soothes the inflammation that accompanies acne lesions.

This multi-pronged mechanism means sulfur tackles acne from several angles at once — which is undeniably one of its strengths.

Concentrations and forms of use

In cosmetics and dermatological preparations, sulfur is typically used in concentrations from 2% to 10%:

• 2–3%: mild action, suitable for everyday use
• 5%: the standard therapeutic concentration in creams and masks
• 8–10%: higher concentrations available in pharmacy preparations, intended for short-term use

The most common forms are sulfur masks (left on for 10–20 minutes), spot treatment gels, sulfur soaps and overnight creams.

The potential to dry out skin — sulfur's main drawback

The biggest risk associated with using sulfur is drying out the skin. Sulfur naturally absorbs sebum and speeds up exfoliation, which — when overused or used incorrectly — can lead to:

• Excessive dryness and flaking of the skin
• Irritation and redness
• Paradoxically, increased sebum production as the skin's defensive response
• Damage to the hydrolipid barrier

That's why proper skin hydration is essential when using sulfur-based preparations. The point isn't to avoid sulfur, but to use it sensibly — with the right moisturizing support.

To understand how different ingredients affect your skin, it's worth checking them in our cosmetic ingredient database.

Combining sulfur with other active ingredients

Sulfur's effectiveness can be enhanced or reduced depending on what you pair it with:

Good combinations

• Sulfur + niacinamide: niacinamide soothes irritation and supports the skin barrier, offsetting sulfur's drying effect
• Sulfur + allantoin: allantoin calms the skin and aids regeneration
• Sulfur + hyaluronic acid: hydration that balances out the drying effect
• Sulfur + zinc PCA: a synergistic sebum-regulating effect

Combinations that require caution

• Sulfur + retinol: both ingredients can irritate the skin — it's better to alternate them (e.g. sulfur in the morning, retinol in the evening)
• Sulfur + salicylic acid: the double keratolytic action can be too intense; start with low concentrations
• Sulfur + benzoyl peroxide (BPO): a classic combination, but potentially very drying — it calls for careful moisturizing

Combinations best avoided

• Sulfur + strong AHA acids (e.g. high-concentration glycolic acid): a risk of excessive exfoliation and irritation
• Sulfur + vitamin C (ascorbic acid): they may neutralize each other's effects

Sulfur vs. other anti-acne ingredients

How does sulfur stack up against modern ingredients?

• Salicylic acid (BHA): more cosmetically elegant and better tolerated, but sulfur offers additional antibacterial action
• Benzoyl peroxide: stronger antibacterial action, but also a greater risk of irritation
• Retinoids: more effective in the long run, but they require a longer period for the skin to adapt
• Niacinamide: gentler and more versatile, but weaker against acute inflammation

Sulfur may not be the "most cutting-edge" ingredient, but it remains an effective and relatively safe tool, especially for mild to moderate acne.

Who is sulfur a good choice for?

Sulfur-based preparations can be especially suitable for people who:

• Don't tolerate benzoyl peroxide or retinoids
• Have mild to moderate acne with blackheads
• Are looking for an ingredient with multi-pronged action
• Need an on-the-spot solution (spot treatment) for individual lesions

People with dry or sensitive skin should be especially cautious and start with the lowest concentrations. As with other controversial ingredients, an individual approach is key.

Summary

Sulfur is a proven, multifunctional anti-acne ingredient that — despite its "old-fashioned" image — still has a legitimate place in modern skincare. Its main drawback is the potential to dry out the skin, but with sensible use and proper hydration, that risk can be minimized.

Check the full ingredient list of your anti-acne products in our search tool and choose your products with confidence.