Compare · Ingredients

Adapalene vs Sulfur

Adapalene: Prevents clogged pores and treats inflammatory and non-inflammatory acne. Sulfur: Used in some acne products and prescribed or compounded scabies regimens.

Research updated 2026-10-25

Five adapalene gel 0.1% tubes and boxes lined up on white, including Differin, Effaclar, PanOxyl and Neutrogena

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

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 Adapalene if…

Choose for clogged pores and ongoing acne prevention; introduce gradually.

Blackheads, whiteheads and pimples
You want an over-the-counter retinoid
You can introduce it slowly at night

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

Fine together

Can you use both?

Sulfur spot treatments can be used on breakouts while using adapalene. Watch for dryness.

At a glance

● Adapalene

● Sulfur

Type

Topical retinoid acne medicine

Keratolytic and antimicrobial medicine

What it does

Prevents clogged pores and treats inflammatory and non-inflammatory acne.

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

Best for

Acne; Post-Inflammatory Hyperpigmentation

Acne; Scabies

Studied concentrations

0.1% is available without prescription in the US; 0.3% is prescription.

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

When to use

At night; introduce gradually according to the product label.

Morning or night, as directed by the finished product.

Time to results

Assess over roughly 3 months; photoaging can take longer

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

Irritation

Dryness, stinging and peeling can occur, especially early in use.

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

Sensitive skin

Choose a simple formula and test a small area first. Avoid actively inflamed or broken skin unless the product is specifically directed for it.

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

Available

0.1% OTC and 0.3% prescription in the US; follow age restrictions.

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

Adapalene

Sulfur

Strong evidenceMost established uses

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

A guideline-supported treatment for comedones and inflammatory lesions.

—

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.

Limited evidenceEarly or small studies

Flat light-brown residual marks on a fair cheek.

Post-Inflammatory Hyperpigmentation

Controlling acne may reduce new marks; established pigment can need additional care.

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

The back of an upper arm on light skin, covered in small rough bumps at every hair opening. Each bump sits in a faint pink ring, so the arm looks evenly speckled and slightly red.

Keratosis Pilaris

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.

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.

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

Rosacea

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

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.

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.

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.

How it works

Adapalene mechanism diagram. Binds retinoid receptors: Adapalene works without conversion to retinoic acid. Helps keep follicles clear: Regulates cell shedding and inflammatory pathways. — Open full-size diagram
Diagram explanation and sources
Binds retinoid receptors: Adapalene works without conversion to retinoic acid. Helps keep follicles clear: Regulates cell shedding and inflammatory pathways.
Schematic illustration; not a measurement of skin penetration. Effects vary with ingredient identity and formulation.
Source 1 · Source 2 · Source 3

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

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

Sunscreen

Night

Step 1

Cleanser

Step 2

AdapaleneNight

Step 3

SulfurNight

Step 4

Moisturizer

Strengths and forms

Concentrations

Adapalene is a medicine, not a cosmetic retinol. U.S. acne formulations include 0.1% and 0.3%; the higher strength is prescription.

0.1%

0.3%

OTC acne gel

A labeled acne treatment in the U.S. Improvement takes time; using extra product does not speed the result.

Prescription acne gel

A higher-strength formulation with comparative trial evidence. A clinician can weigh benefit against irritation.

Choosing a strength: Choose the medicine and vehicle for acne severity and tolerance. Adapalene percentages are not equivalent to retinol or retinaldehyde percentages.

Higher strengths: Dryness, peeling and irritation can occur. Do not step up strength or combine several retinoids just because improvement is slow.

Formula matters: Products combining adapalene with benzoyl peroxide have additional active ingredients and different labeling; read the whole product name.

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.

Forms

Gel · Cream · Combination gel

Mask · Spot treatment · Wash

When you’ll see results

Approximate windows, not promises.

● Adapalene

● Sulfur

First few weeks

First few weeksDryness or irritation may occur; worsening is not required for benefit.

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

4–8 weeks

4–8 weeksFewer new lesions may become noticeable.

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

8–12 weeks

8–12 weeksReassess acne control after a consistent course.

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

3–6 months

3–6 monthsMaintenance may help if the treatment works and remains comfortable.

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

6–12 months

6–12 monthsContinue only if appropriate; scarring or persistent acne warrants reassessment.

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

Safety and sensitive skin

Common reactions

Dryness, stinging and peeling can occur, especially early in use.

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

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. Avoid actively inflamed or broken skin unless the product is specifically directed for it.

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

Important limits

Follow the age and use restrictions on the label; OTC adapalene 0.1% is labelled for ages 12 and older in the US.

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

Pregnancy

Retinoids are avoided in pregnancy and while trying to conceive.

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

How it works

In the skin

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

Entering skin. Below the 500 Da guideline; delivery still depends on the formula, solubility, stability and skin condition. Size does not prove effectiveness or penetration depth.

Conversion. Binds retinoid receptors directly; it does not need conversion into retinoic acid.

Skin response. Binds retinoid receptors directly, regulating follicular cell shedding and inflammatory pathways.

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 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.

Getting in

Below the 500 Da guideline; delivery still depends on the formula, solubility, stability and skin condition. Size does not prove effectiveness or penetration depth.

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

Molecule size

Adapalene · 412 Da

Sulfur · 256 Da

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

500 Da guideline

Product examples

Adapalene

La Roche-Posay Effaclar Adapalene Gel 0.1% Topical Retinoid For Acne

Sulfur

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

Common questions

Adapalene:What should I choose adapalene for?

Choose for clogged pores and ongoing acne prevention; introduce gradually.

Adapalene:How strong is the evidence?

Guidelines and controlled acne trials support adapalene. Evidence for acne medicines should not be transferred automatically to retinol, and irritation does not indicate greater benefit.

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.

Sources

Sources and further reading

Dermapedia on YouTube