Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Curology Deep Cleanse RX Versus First Aid Beauty Pure Skin Face Cleanser

Curology Deep Cleanse RX Versus First Aid Beauty Pure Skin Face Cleanser This salicylic acid gel cleanser is formulated around Salicylic Acid to clear breakouts and unclog pores. This mild cream cleanser is made to cleanse while calming and soothing your skin.

Curology Deep Cleanse RX Versus First Aid Beauty Pure Skin Face Cleanser

This salicylic acid gel cleanser is formulated around Salicylic Acid to clear breakouts and unclog pores.

This mild cream cleanser is made to cleanse while calming and soothing your skin.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Sulfacetamide Sodium 10%

Zinc Pyrithione 0.5%

Salicylic Acid 1%

Water

Sodium Cocoyl Isethionate

Cocamidopropyl Hydroxysultaine

Acrylates Copolymer

Propanediol

Xylitylglucoside

Coconut Alcohol

Coco-Glucoside

Anhydroxylitol

Stearic Acid

1,2-Hexanediol

Panthenol

Sodium Hydroxide

Xylitol

PEG-150 Pentaerythrityl Tetrastearate

Stearyl Alcohol

Glycerin

Citric Acid

Sodium Chloride

Sodium Isethionate

Caprylhydroxamic Acid

Xanthan Gum

Glucose

Potassium Sorbate

Avena Sativa Kernel Extract

Sulfacetamide Sodium 10%, Zinc Pyrithione 0.5%, Salicylic Acid 1%, Water, Sodium Cocoyl Isethionate, Cocamidopropyl Hydroxysultaine, Acrylates Copolymer, Propanediol, Xylitylglucoside, Coconut Alcohol, Coco-Glucoside, Anhydroxylitol, Stearic Acid, 1,2-Hexanediol, Panthenol, Sodium Hydroxide, Xylitol, PEG-150 Pentaerythrityl Tetrastearate, Stearyl Alcohol, Glycerin, Citric Acid, Sodium Chloride, Sodium Isethionate, Caprylhydroxamic Acid, Xanthan Gum, Glucose, Potassium Sorbate, Avena Sativa Kernel Extract

Hydrogenated Coconut Acid

Allantoin

Chrysanthemum Parthenium Extract

Camellia Sinensis Leaf Extract

Glycyrrhiza Glabra Root Extract

Aloe Barbadensis Leaf Juice

Tocopherol

Hydrogenated Palm Glycerides Citrate

Phenoxyethanol

Disodium Cocoamphodiacetate

Sodium PCA

Hydroxypropyl Methylcellulose

Glyceryl Oleate

Disodium EDTA

Sodium Benzoate

Maltodextrin

Tetrasodium EDTA

Water, Sodium Cocoyl Isethionate, Glycerin, Stearic Acid, Hydrogenated Coconut Acid, Sodium Isethionate, Stearyl Alcohol, Allantoin, Chrysanthemum Parthenium Extract, Camellia Sinensis Leaf Extract, Glycyrrhiza Glabra Root Extract, Aloe Barbadensis Leaf Juice, Tocopherol, Hydrogenated Palm Glycerides Citrate, Phenoxyethanol, Disodium Cocoamphodiacetate, Sodium PCA, Hydroxypropyl Methylcellulose, Coco-Glucoside, Glyceryl Oleate, Sodium Chloride, Disodium EDTA, Citric Acid, Potassium Sorbate, Sodium Benzoate, Maltodextrin, Tetrasodium EDTA

Reviews

Be the first to review

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

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.

Coco-Glucoside is a surfactant, or a cleansing ingredient. It is made from glucose and coconut oil.

Surfactants help gather dirt, oil, and other pollutants from your skin to be rinsed away.

This ingredient is considered gentle and non-comedogenic. However, it may still be irritating for some.

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.

Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.

This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.

Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.

You'll often find this ingredient used with other preservatives.

Chances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt. This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.

You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.

You might see people debate whether Sodium Chloride is comedogenic, but there actually haven't been any comedogenic tests done on it. Either way, the overall formulation of a product matters a lot more than any single ingredient.

You might see this ingredient used in scrubs as a primary exfoliating ingredient.

Sodium cocoyl isethionate is a natural ingredient from coconut oil. It is an ultra gentle cleanser that gives a nice foam without drying the skin or impacting the skin barrier.

The amount of foam created depends on the amount of sodium cocoyl isethionate used in the product.

This ingredient also helps improve the spreadability of a product.

This ingredient hasn’t been shown in studies to feed fungal acne yeast.

We don't have a description for Sodium Isethionate yet.

Stearic Acid is a fatty acid that is already found in your skin. It's one of the free fatty acids that works alongside ceramides and cholesterols to maintain your barrier.

In cosmetics, it is a multitasker:

Safety-wise, the CIR Expert Panel has concluded it to be safe in cosmetics when formulated to be non-irritating and non-sensitizing.

Free stearic acid is a C18 fatty acid that the Malassezia yeast can substrate, so this ingredient may not be fungal acne safe.

Stearyl Alcohol is a type of fatty alcohol from stearic acid. It is a white, waxy compound used to emulsify ingredients used as an emollient or to thicken a product.

Emollients help soothe and hydrate the skin by trapping moisture.

Fatty alcohols are usually derived from natural fats and oils and therefore do not have the same drying or irritating effect as solvent (ethanol) alcohols.

The FDA allows products labeled "alcohol-free" to have fatty alcohols.

This ingredient may not be fungal acne safe. It is a primary fatty alcohol with a chain length above 12 carbons. A study from 2019 show Malassezia can feed on fatty alcohols in this range, so it may trigger fungal acne in those prone to it.

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!

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Side-by-side

  1. 01Water
  2. 02Dimethicone
  3. 03Propanediol
  4. 04Butylene Glycol
  5. 05Niacinamide
  6. 06Nylon-12
  7. 07Acrylates Crosspolymer
  8. 08Sodium Hyaluronate
  9. 09Enantia Chlorantha Bark Extract
  10. 10Avena Sativa Kernel Extract
  11. 11Camellia Sinensis Leaf Extract
  12. 12Chrysanthemum Parthenium Extract
  13. 13Glycerin
  14. 14Oleanolic Acid
  15. 15Sorbitan Isostearate
  16. 16Caprylyl Glycol
  17. 17Glyceryl Stearate Citrate
  18. 18Hydrogenated Polydecene
  19. 192-Hydroxyethyl Acrylate
  20. 201,2-Hexanediol
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side