Skin science article
Acne Free Sulfur Acne Foaming Cleanser Versus Paula's Choice Clear Pore Normalizing Cleanser
Acne Free Sulfur Acne Foaming Cleanser Versus Paula's Choice Clear Pore Normalizing Cleanser This sulfur foaming cleanser is formulated around Sulfur to clear breakouts. This salicylic acid gel cleanser is formulated around Salicylic Acid to clear breakouts an
Acne Free Sulfur Acne Foaming Cleanser Versus Paula's Choice Clear Pore Normalizing Cleanser
This sulfur foaming cleanser is formulated around Sulfur to clear breakouts.
This salicylic acid gel cleanser is formulated around Salicylic Acid to clear breakouts and unclog pores.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Sulfur 3.5%
Water
Glycerin
Propylene Glycol
Cocamidopropyl Hydroxysultaine
Sodium C14-16 Olefin Sulfonate
Xanthan Gum
Acacia Senegal Gum
Phenoxyethanol
Caprylyl Glycol
Citric Acid
Citrus Limon Peel Oil
Limonene
Potassium Hydroxide
Ethylhexylglycerin
Hexylene Glycol
Sodium Hyaluronate
Niacinamide
Sodium Sulfate
Avena Sativa Bran Extract
Sodium Lauroyl Lactylate
Glycolic Acid
Calendula Officinalis Flower Extract
Ceramide NP
Ceramide AP
Phytosphingosine
Cholesterol
Carbomer
Ceramide EOP
Sulfur 3.5%, Water, Glycerin, Propylene Glycol, Cocamidopropyl Hydroxysultaine, Sodium C14-16 Olefin Sulfonate, Xanthan Gum, Acacia Senegal Gum, Phenoxyethanol, Caprylyl Glycol, Citric Acid, Citrus Limon Peel Oil, Limonene, Potassium Hydroxide, Ethylhexylglycerin, Hexylene Glycol, Sodium Hyaluronate, Niacinamide, Sodium Sulfate, Avena Sativa Bran Extract, Sodium Lauroyl Lactylate, Glycolic Acid, Calendula Officinalis Flower Extract, Ceramide NP, Ceramide AP, Phytosphingosine, Cholesterol, Carbomer, Ceramide EOP
Salicylic Acid
Sodium Lauroyl Sarcosinate
Acrylates/Steareth-20 Methacrylate Copolymer
PEG-200 Hydrogenated Glyceryl Palmate
Sodium Laureth Sulfate
Arginine
Butylene Glycol
PEG-7 Glyceryl Cocoate
Panthenol
Disodium EDTA
PEG-60 Hydrogenated Castor Oil
Sodium Citrate
Chlorphenesin
Salicylic Acid, Water, Sodium Lauroyl Sarcosinate, Acrylates/Steareth-20 Methacrylate Copolymer, Glycerin, PEG-200 Hydrogenated Glyceryl Palmate, Sodium Laureth Sulfate, Arginine, Butylene Glycol, PEG-7 Glyceryl Cocoate, Panthenol, Disodium EDTA, Citric Acid, PEG-60 Hydrogenated Castor Oil, Sodium Citrate, Phenoxyethanol, Caprylyl Glycol, Chlorphenesin
Reviews
Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.
Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.
However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.
Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.
In skincare formulas, citric acid can:
While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.
Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.
Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.
However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.
Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.
On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.
Another perk of this ingredient is that it stays functional across a wide pH range (3-10).
You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.
Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.
Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.
Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!