Compare · Ingredients

Sulfur vs Zinc Oxide

Sulfur: Used in some acne products and prescribed or compounded scabies regimens. Zinc Oxide: Provides UV protection in tested sunscreens and wetness protection in barrier creams.

Research updated 2026-10-25

Four sulfur acne products: Kate Somerville EradiKate, De La Cruz 10% sulfur ointment, The Ordinary and Thayers

Four mineral sunscreens on white: Native SPF 30, Thinksport SPF 50, Colorescience Flex and EltaMD UV Clear

Which one?At a glance What it helps Diagrams Using both Strengths Results Safety How it works Products Questions

Which one is right for you?

Choose Sulfur if…

Consider for an appropriate acne product; suspected scabies needs diagnosis and a complete plan.

Mild acne or a spot treatment
Sensitive skin that dislikes benzoyl peroxide
Smell is acceptable

Choose Zinc Oxide if…

Choose a broad-spectrum sunscreen you will use consistently, or a labelled barrier paste for wetness.

Sensitive skin or melasma
Broad UVA and UVB protection
Diaper or friction areas

Fine together

Can you use both?

Sulfur and zinc are both used in calming acne masks; zinc sunscreen goes last in the morning.

At a glance

● Sulfur

● Zinc Oxide

Type

Keratolytic and antimicrobial medicine

Mineral UV filter and skin protectant

What it does

Used in some acne products and prescribed or compounded scabies regimens.

Provides UV protection in tested sunscreens and wetness protection in barrier creams.

Best for

Acne; Scabies

Sunburn; Diaper Rash; Melasma; Wrinkles and Fine Lines

Studied concentrations

Acne products commonly use 3–10%; scabies ointments use separate 5–10% regimens.

Use a tested sunscreen by its broad-spectrum SPF; barrier pastes are different products.

When to use

Morning or night, as directed by the finished product.

Each morning and before sun exposure.

Time to results

Often 8–12 weeks in small cosmetic studies; results may be subtle

Protection with correct application; prevention continues over time

Irritation

Odour, dryness and irritation can limit use; avoid strong products on inflamed eczema.

May leave a white cast or feel heavy; other formula ingredients can irritate.

Sensitive skin

Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle.

Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle.

Available

Prescription or cosmetic status depends on the active, formula and country; check the label.

Prescription or cosmetic status depends on the active, formula and country; check the label.

What it helps

Compare uses by strength of evidence. Evidence level describes confidence in a benefit, not its size.

Evidence level

Sulfur

Zinc Oxide

Strong evidenceMost established uses

—

Sunburn: 1. Sunburn Header — Light Skin; Lighter skin.

Sunburn

A correctly used tested sunscreen helps prevent UV sunburn.

Moderate evidenceSome supportive research

The finger webs and wrist on fair light skin, with small red bumps, several thin gray burrow lines a few millimetres long, and scratch marks across the area.

Scabies

CDC lists compounded 5–10% sulfur ointment as an alternative treatment.

Diaper Rash, close-up of representative skin findings.

Diaper Rash

Labelled zinc-oxide pastes protect skin from wetness and friction.

Flat tan patches with soft irregular edges across the forehead and upper cheek of an adult with light skin, the surface completely smooth.

Melasma

Sun protection supports melasma care; tinted formulas may add visible-light protection.

A relaxed forehead with faint shallow horizontal fine lines.

Wrinkles and Fine Lines

Regular sunscreen helps prevent further photoaging rather than erase existing folds.

Limited evidenceEarly or small studies

Inflamed acne on light skin. The spots sit in a patch of pink, and the ring of redness around each one is easy to see. A few have a yellow-white head, and the skin between them is dry and flaking.

Acne

Used in acne products, with less robust modern evidence than standard acne medicines.

—

Insufficient evidence

Redness and fine superficial vessels across a light-skinned cheek and nose.

Rosacea

Combination sulfacetamide/sulfur products do not establish sulfur alone as treatment.

Salmon-pink patches with fine greasy yellowish scale in the crease beside the nose and through the eyebrow on fair skin, with soft edges that fade into normal skin.

Seborrheic Dermatitis

The reviewed sources do not establish this ingredient as a treatment for this concern.

Extreme close-up of light skin in an active eczema flare, too close to tell which part of the body it is. Blotchy pink-red inflammation covers the whole frame with no clear edge, with small raised bumps, fine dry scale and a few fresh scratch marks.

Eczema

The reviewed sources do not establish this ingredient as a treatment for this concern.

Acne scarring on light skin. Small sharply cut pits and broad shallow dips across a cheek, several sitting inside faint flat pink marks, with no active spots.

Acne Scarring

The reviewed sources do not establish this ingredient as a treatment for this concern.

Inflamed acne on light skin. The spots sit in a patch of pink, and the ring of redness around each one is easy to see. A few have a yellow-white head, and the skin between them is dry and flaking.

Acne

The reviewed sources do not establish this ingredient as a treatment for this concern.

Redness and fine superficial vessels across a light-skinned cheek and nose.

Rosacea

The reviewed sources do not establish this ingredient as a treatment for this concern.

How it works

Sulfur mechanism diagram. Helps loosen surface keratin: Sulfur preparations can promote exfoliation. Acts against microbes: Effects depend on the preparation and intended use. — Open full-size diagram
Diagram explanation and sources
Helps loosen surface keratin: Sulfur preparations can promote exfoliation. Acts against microbes: Effects depend on the preparation and intended use.
Schematic illustration; not a measurement of skin penetration. Effects vary with ingredient identity and formulation.
Source 1 · Source 2 · Source 3

Zinc Oxide mechanism diagram. Absorbs and scatters UV: Particles act in a film at the skin surface. The full sunscreen matters: Broad-spectrum protection depends on the formula. — Open full-size diagram
Diagram explanation and sources
Absorbs and scatters UV: Particles act in a film at the skin surface. The full sunscreen matters: Broad-spectrum protection depends on the formula.
Schematic illustration; not a measurement of skin penetration. Effects vary with ingredient identity and formulation.
Source 1 · Source 2 · Source 3 · Source 4

Using both in one routine

Built from where each one usually sits in a routine. Introduce one at a time.

Morning

Step 1

Cleanser

Step 2

Moisturizer

Step 3

Zinc OxideMorning

Night

Step 1

Cleanser

Step 2

SulfurNight

Step 3

Moisturizer

Strengths and forms

Concentrations

Sulfur strength depends on the condition: U.S. OTC acne products use 3–10%, while compounded scabies ointments use a separate 5–10% range.

3–10%

5–10%

OTC acne range

For qualifying acne products. A wash, mask and leave-on product have different contact instructions.

Compounded scabies ointment

A clinician-directed alternative discussed by CDC. It is a separate treatment, not ordinary facial skincare.

Choosing a strength: Choose for the diagnosis and complete product. Sulfur-only acne products and prescription sulfacetamide/sulfur combinations are not the same.

Higher strengths: More sulfur is not automatically more useful, and dryness or irritation may limit use.

Formula matters: Wash-off versus leave-on use matters. Scabies treatment requires a whole treatment plan rather than choosing a percentage alone.

Zinc oxide sunscreen and thick barrier ointment have different jobs. U.S. sunscreen concentrations can be up to 25%; some skin-protectant ointments use more than 25% through 40%.

25%

25–40%

U.S. sunscreen ceiling

The permitted upper concentration is not an SPF rating. Choose a finished sunscreen by its tested protection.

Higher skin-protectant ointments

The monograph specifies more than 25% through 40% in ointments. These barrier products are not automatically sunscreens.

Choosing a strength: For sun protection, choose a tested broad-spectrum sunscreen with appropriate SPF. For a barrier ointment, choose its labeled protective purpose.

Higher strengths: More zinc oxide alone does not prove higher SPF, better UVA coverage or a better diaper-rash result.

Formula matters: Particle characteristics, dispersion and the full formula affect protection and feel. An unlabeled zinc paste should not be substituted for sunscreen.

Forms

Mask · Spot treatment · Wash

Sunscreen · Tinted sunscreen · Barrier paste

When you’ll see results

Approximate windows, not promises.

● Sulfur

● Zinc Oxide

First few weeks

First few weeksAssess tolerance and texture; immediate softness can come from the base formula.

First few weeksProtection starts with correct application; it does not require a weeks-long course.

4–8 weeks

4–8 weeksSubtle changes may appear in some tested products; evidence varies.

4–8 weeksConsistency matters; this is prevention, not a spot-clearing treatment.

8–12 weeks

8–12 weeksCompare photographs in the same lighting and reassess benefit.

8–12 weeksContinue correct application and reapplication.

3–6 months

3–6 monthsPhotoaging trials often need several months; expect modest rather than dramatic change.

3–6 monthsMonitor tolerance and sun exposure; a changing spot needs assessment.

6–12 months

6–12 monthsLong-term evidence is limited for many cosmetic actives; continue only if useful.

6–12 monthsPhotoaging prevention is a long-term benefit, not a promise of wrinkle reversal.

Safety and sensitive skin

Common reactions

Odour, dryness and irritation can limit use; avoid strong products on inflamed eczema.

May leave a white cast or feel heavy; other formula ingredients can irritate.

When to stop

Stop for persistent burning, swelling, blistering or a new rash. Seek urgent care for breathing difficulty or a severe allergic reaction.

Stop for persistent burning, swelling, blistering or a new rash. Seek urgent care for breathing difficulty or a severe allergic reaction.

Sensitive or inflamed skin

Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle.

Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle.

Important limits

Do not use a cosmetic product as a substitute for diagnosis of an unexplained, changing or persistent skin problem.

Do not use a cosmetic product as a substitute for diagnosis of an unexplained, changing or persistent skin problem.

Pregnancy

Topical sulfur is generally considered acceptable in pregnancy; ask the clinician managing your pregnancy.

Mineral sunscreens are generally considered acceptable in pregnancy.

How it works

In the skin

On the skin. The finished product delivers sulfur in a particular vehicle.

Entering skin. Below 500 Da in this molecular form. Its useful surface action does not require deep delivery; the formula and skin condition matter.

Conversion. No activation step is established as necessary for its intended topical role.

Skin response. Promotes surface shedding and has antimicrobial activity; effects and instructions depend on the preparation.

Additional effects. Proposed pathways do not establish a measured depth of delivery or clinical benefit beyond the studies cited.

On the skin. The finished product delivers zinc oxide in a particular vehicle.

Entering skin. Formula-unit mass is not particle size. These mineral particles act in the surface sunscreen film; the 500 Da guideline does not predict particle penetration.

Conversion. No activation step is established as necessary for its intended topical role.

Skin response. Particles absorb and scatter UV at or near the surface; barrier pastes also shield skin from moisture and friction.

Additional effects. Proposed pathways do not establish a measured depth of delivery or clinical benefit beyond the studies cited.

Getting in

Below 500 Da in this molecular form. Its useful surface action does not require deep delivery; the formula and skin condition matter.

Formula-unit mass is not particle size. These mineral particles act in the surface sunscreen film; the 500 Da guideline does not predict particle penetration.

Molecule size

Sulfur · 256 Da

Zinc Oxide · 81 Da

Smaller than 500 Da passes the outer skin more easily. Size isn’t an effectiveness score.

500 Da guideline

Product examples

Sulfur

Murad Rapid Relief Acne Sulfur Mask
The Ordinary Sulfur 10% Powder-To-Cream Concentrate
Naturium The Revealer Sulfur Body Wash

Zinc Oxide

ROUND LAB Birch Juice Sun Cushion — A zinc oxide sunscreen in a cushion compact, made for reapplying over makeup. Unlike much of the K-beauty sun market, this one is sold here by the brand itself.
Vanicream Facial Moisturizer SPF 30 — Fragrance-free mineral sunscreen — 19.5% zinc oxide, five ceramides. Cheap, boring, built for reactive skin.
EltaMD UV Clear Tinted — The same formula as EltaMD UV Clear, with iron oxides added for a sheer tint. The tint cancels the white cast — up to a point.

Common questions

Sulfur:What should I choose sulfur for?

Consider for an appropriate acne product; suspected scabies needs diagnosis and a complete plan.

Sulfur:How strong is the evidence?

Modern isolated-sulfur acne evidence is limited; studies of sulfacetamide/sulfur cannot isolate sulfur. CDC describes sulfur ointment as a scabies option, but an acne wash is not a substitute for that regimen.

Zinc Oxide:What should I choose zinc oxide for?

Choose a broad-spectrum sunscreen you will use consistently, or a labelled barrier paste for wetness.

Zinc Oxide:How strong is the evidence?

Sun protection is established for tested sunscreen products, not loose zinc powder. Formula-unit mass is not particle size. A sunscreen ageing trial cannot isolate zinc oxide or prove reversal of existing wrinkles.

Sources

Sources and further reading

Dermapedia on YouTube