Skin science article
iUNIK Centella Bubble Cleansing Foam Versus The INKEY List Salicylic Acid Cleanser
iUNIK Centella Bubble Cleansing Foam Versus The INKEY List Salicylic Acid Cleanser This mild foaming cleanser is made to cleanse while calming and soothing your skin. This salicylic acid gel cleanser is formulated around Salicylic Acid to clear breakouts and u
iUNIK Centella Bubble Cleansing Foam Versus The INKEY List Salicylic Acid Cleanser
This mild foaming cleanser is made to cleanse while calming and soothing your skin.
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
Centella Asiatica Leaf Water 69%
Water
Disodium Cocoamphodiacetate
1,2-Hexanediol
Sodium Chloride
Tea-Cocoyl Glutamate
Hexylene Glycol
Citric Acid
Polyglyceryl-4 Caprate
Pentylene Glycol
Butylene Glycol
Caprylyl Glycol
Trehalose
Allantoin
Glycerin
Melaleuca Alternifolia Leaf Water
Oryza Sativa Bran Extract
Portulaca Oleracea Extract
Perilla Frutescens Leaf Extract
Aspalathus Linearis Extract
Commiphora Myrrha Resin Extract
Glycyrrhiza Glabra Root Extract
Ethylhexylglycerin
Centella Asiatica Leaf Water 69%, Water, Disodium Cocoamphodiacetate, 1,2-Hexanediol, Sodium Chloride, Tea-Cocoyl Glutamate, Hexylene Glycol, Citric Acid, Polyglyceryl-4 Caprate, Pentylene Glycol, Butylene Glycol, Caprylyl Glycol, Trehalose, Allantoin, Glycerin, Melaleuca Alternifolia Leaf Water, Oryza Sativa Bran Extract, Portulaca Oleracea Extract, Perilla Frutescens Leaf Extract, Aspalathus Linearis Extract, Commiphora Myrrha Resin Extract, Glycyrrhiza Glabra Root Extract, Ethylhexylglycerin
Propanediol
Sodium Methyl Cocoyl Taurate
Cocamidopropyl Betaine
PEG-120 Methyl Glucose Dioleate
Salicylic Acid
PEG-150 Pentaerythrityl Tetrastearate
PEG-6 Caprylic/Capric Glycerides
Betaine
Zinc PCA
Phenoxyethanol
Sodium Hydroxide
Coco-Glucoside
Glyceryl Oleate
Benzyl Alcohol
Coconut Acid
Sodium Benzoate
Dehydroacetic Acid
Trisodium Ethylenediamine Disuccinate
Tocopherol
Hydrogenated Palm Glycerides Citrate
Water, Propanediol, Glycerin, Sodium Methyl Cocoyl Taurate, Cocamidopropyl Betaine, PEG-120 Methyl Glucose Dioleate, Salicylic Acid, PEG-150 Pentaerythrityl Tetrastearate, PEG-6 Caprylic/Capric Glycerides, Betaine, Zinc PCA, Phenoxyethanol, Sodium Chloride, Allantoin, Sodium Hydroxide, Coco-Glucoside, Glyceryl Oleate, Benzyl Alcohol, Coconut Acid, Ethylhexylglycerin, Sodium Benzoate, Citric Acid, Dehydroacetic Acid, Trisodium Ethylenediamine Disuccinate, Tocopherol, Hydrogenated Palm Glycerides Citrate
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.
Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
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.
Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:
The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.
Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.
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.
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.
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!