CU Skin Bifida Barrier Toner
A toner with 26 ingredients, including hyaluronic acid, ceramides, and peptides.
Overview
What it is
Toner with 26 ingredients that contains ceramides, hyaluronic acid and peptides
Cool Features
It is reef safe
Suited For
It has ingredients that are good for anti aging, dry skin, brightening skin, sensitive skin, scar healing, dark spots and better texture
Free From
It doesn't contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates
Fun facts
CU Skin is from South Korea. This product is used in 1 routines created by our community.
We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.
What's inside
Ingredients List
Bifida Ferment Lysate 85%
Skin ConditioningButylene Glycol
Humectant1,2-Hexanediol
Skin ConditioningGlycerin
HumectantBetaine
HumectantGlyceryl Glucoside
HumectantWater
Skin ConditioningTriethyl Citrate
MaskingAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingEclipta Prostrata Extract
Skin ConditioningTromethamine
BufferingEthylhexylglycerin
Skin ConditioningSodium Hyaluronate
HumectantDisodium EDTA
Lactococcus Ferment Lysate
Skin ConditioningLactobacillus Ferment Lysate
Skin ConditioningPropanediol
SolventHydrogenated Lecithin
EmulsifyingCeramide NP
Skin ConditioningSaccharomyces/Barley Seed Ferment Filtrate
HumectantLactobacillus/Soybean Ferment Extract
Skin ConditioningLactobacillus/Punica Granatum Fruit Ferment Extract
Skin ConditioningLactobacillus/Pear Juice Ferment Filtrate
Skin ConditioningCopper Tripeptide-1
Skin ConditioningAlanine/Histidine/Lysine Polypeptide Copper Hcl
Skin ConditioningAcetyl Hexapeptide-8
HumectantBifida Ferment Lysate 85%, Butylene Glycol, 1,2-Hexanediol, Glycerin, Betaine, Glyceryl Glucoside, Water, Triethyl Citrate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Eclipta Prostrata Extract, Tromethamine, Ethylhexylglycerin, Sodium Hyaluronate, Disodium EDTA, Lactococcus Ferment Lysate, Lactobacillus Ferment Lysate, Propanediol, Hydrogenated Lecithin, Ceramide NP, Saccharomyces/Barley Seed Ferment Filtrate, Lactobacillus/Soybean Ferment Extract, Lactobacillus/Punica Granatum Fruit Ferment Extract, Lactobacillus/Pear Juice Ferment Filtrate, Copper Tripeptide-1, Alanine/Histidine/Lysine Polypeptide Copper Hcl, Acetyl Hexapeptide-8
Key Ingredients
Benefits
Ingredients Explained
Bifida Ferment Lysate is derived from the fermentation of Bifida bacteria (often with dairy). It is a probiotic and helps to strengthen our skin's microbiome.
Having a healthy microbiome helps protect our skin against infection. It also helps our skin stay hydrated and healthy.
Studies also show this ingredient to be a promising soothing ingredient for sensitive skin.
Learn more about Bifida Ferment LysateButylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene Glycol1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Â
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesÂ
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinBetaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.
This ingredient is best for improving hydration and soothing irritated skin. Studies also show it helps even out skin tone.
Fun fact: Betaine is naturally created in the skin and body. The kind found within cosmetic products can be either plant-derived or synthetic.
Another name for betaine is trimethylglycine.
Learn more about BetaineGlyceryl Glucoside is made from glycerol and glucose.
It is a humectant. Humectants help hydrate your skin by drawing moisture to it from the air.
Some foods that contain glyceryl glucoside include sake, miso, and wines.
Learn more about Glyceryl GlucosideWater. 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. Stay hydrated!
Learn more about WaterTriethyl Citrate comes from citric acid. It has masking, perfuming, and solvent properties. As a solvent, this ingredient helps disperse ingredients evenly in skincare.
One manufacturer claims this ingredient can:
According to perfume manufacturers, this ingredient is almost odorless but has a mild fruity, wine and plum scent. It can be used to mask the scent of other ingredients.
This ingredient can be plant-sourced or synthetic; it can naturally be found in cabbage and white wine.
Learn more about Triethyl CitrateAcrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken and improve the texture of products. Due to its properties, it can prevent water and oil ingredients from separating.
This ingredient is also known as Bhringaraj extract or False Daisy. It has skin conditioning properties and is rich in antioxidants.
Tromethamine helps balance the pH and improve the texture of a product. It is synthetically created.
As an emulsifier, Tromethamine prevents oil and water ingredients from separating. This helps stabilize the product and elongate a product's shelf life. Tromethamine also makes a product thicker.
Tromethamine helps balance the pH level of a product. Normal pH level of skin is slightly acidic (~4.75-5.5). The acidity of our skin is maintained by our glands and skin biome. Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.
Oral Tromethanmine is an anti-inflammatory drug but plays the role of masking, adding fragrance, and/or balancing pH in skincare.
1,3-Propanediol, 2-amino-2-(hydroxymethyl)-
Learn more about TromethamineEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateDisodium EDTA plays a role in making products more stable by aiding other preservatives.
It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.
Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.
Learn more about Disodium EDTALactococcus Ferment Lysate is a postbiotic created by fermenting Lactoccus lactis, a type of bacteria more commonly used to create Lactic acid.
Postbiotics are inactive molecules produced by probiotic bacteria that provide skin benefits.
This ingredient offers promising benefits, but it is relatively new and more evidence is needed to prove its efficacy. The manufacturer claims this ingredient:
A study from 2022 found this ingredient helped protect skin against damaged from UV exposure (though this should not replace your sunscreen!).
The lysate in the ingredient name refers to a fluid that forms from breaking down the cell membrane.
Learn more about Lactococcus Ferment LysateLactobacillus Ferment Lysate is a postbiotic with skin soothing properties. Postbiotics are inactive molecules produced by probiotic bacteria that provide skin benefits.
This ingredient comes from the secretion of the bacteria, Lactobacillus.
Studies show this ingredient can help calm redness and may help treat the signs of photoaging; however, the evidence is inconclusive and further studies are needed.
Learn more about Lactobacillus Ferment LysatePropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
Itâs often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolHydrogenated Lecithin is created from the hydrogenation of lecithin (a group of phospholipids). Hydrogenation is a chemical reaction between hydrogen and another element.
This ingredient is an emollient and emulsifier. As an emollient, it helps soften skin by trapping moisture within. As an emulsifier, it prevents oil and water ingredients from separating.
Ceramide NP is a type of ceramide and formally known as ceramide 3.
Ceramides are intercellular lipids naturally found in our skin that bonds dead skin cells together to create a barrier. They are known for their ability to hold water and thus are a great ingredient for dry skin.
Ceramides are an important building block for our skin barrier. A stronger barrier helps the skin look more firm and hydrated. By bolstering the skin ceramides act as a barrier against irritating ingredients. This can help with inflammation as well.
If you would like to eat ceramides, sweet potatoes contain a small amount.
Read more about other common types of ceramides here:
Ceramide AP
Ceramide EOP
We don't have a description for Saccharomyces/Barley Seed Ferment Filtrate yet.
This ingredient is created by fermenting soybean extract with the bacteria, lactobacillus.
Some studies have shown it to have antioxidant properties. One study found this ingredient to have stronger properties than non-fermented soybean extract.
Another study found in increase of isoflavones, amino acids, and peptides in fermented soy milk.
Learn more about Lactobacillus/Soybean Ferment ExtractThis ingredient comes from fermenting pomegranate with lactobacillus.
It displays strong antioxidant properties. One study found fermented pomegranate to help with moisture, brightness, elasticity, and collagen after 8 weeks.
We don't have a description for Lactobacillus/Pear Juice Ferment Filtrate yet.
Copper Tripeptide-1 (GHK-Cu) is a skin repairing ingredient known for its ability to boost collagen, improve firmness, and support skin regeneration.
It is a complex made up of a naturally occurring peptide (glycine-histidine-lysine) and copper, an essential trace element.
While studying wound healing, researchers noticed GHK-Cu stimulated hair follicle enlargement and growth by keeping hair in its active growth phase longer. This has made it a promising ingredient for hair regrowth treatments.
Some people have reported increased facial hair. While GHK-Cu can make your hair follicles bigger, it usually doesnât turn soft, barely-visible facial hairs into thick, dark ones.
Anecdotal reports suggest that overusing copper peptides might lead to premature aging due to excess free copper or enzyme imbalances. This claim isnât backed by large-scale studies.
Unfortunately, there are limited human studies for this ingredient. While early results are promising, many studies are either small, in-vitro, or not rigorously controlled.
For example, there is a 1998 study that explored the effects of copper tripeptide, vitamin C, tretinoin, and melatonin on skin repair and collagen synthesis.
After one month, increased procollagen production was seen in 7 out of 10 participants using copper tripeptide (more than those using vitamin C, melatonin, or tretinoin.
While the study was exploratory, it offers early evidence that copper tripeptide may support collagen production. Larger, well-designed trials are still needed to confirm its potential and understand individual responses.
Read more about other common types of peptides here:
Learn more about Copper Tripeptide-1Alanine/Histidine/Lysine Polypeptide Copper Hcl is a peptide.
Acetyl Hexapeptide-8, commonly known as Argireline or Acetyl Hexapeptide-3, is a popular peptide in skincare. Itâs often referred to as a âBotox-likeâ ingredient because it helps reduce muscle movement.
By relaxing these micro-movements, Argireline may help minimize the appearance of fine lines and wrinkles. That said, itâs not as powerful as Botox, and research on its long-term effectiveness is still limited.
Beyond smoothing, Argireline may also support collagen production. Collagen is the protein that helps keep your skin firm, bouncy, and well-hydrated by strengthening the skin barrier.
So while Argireline isnât a miracle fix, it can be a helpful addition to a routine focused on both prevention and skin health.
Read more about other common types of peptides here:
Learn more about Acetyl Hexapeptide-8Reviews
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Where it's from
CU Skin is a Korean brand
We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about us· Published November 25, 2025 • Added by tv3