Overview
What it is
Serum with 18 ingredients that contains peptides
Cool Features
It is vegan, cruelty-free, and reef safe
Suited For
It has ingredients that are good for anti aging, dry skin, scar healing and better texture
Free From
It doesn't contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates
Fun facts
One. Two. Free! is from Germany. This product is used in 5 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
Water
Skin ConditioningGlycerin
Humectant
Methylpropanediol
SolventXanthan Gum
EmulsifyingUndaria Pinnatifida Cell Culture Extract
Skin ConditioningCaprylyl Glycol
Emollient
S-Mu-Conotoxin Cniiic Acetate
Skin ConditioningButylene Glycol
Humectant
Phenylpropanol
Masking
Citric Acid
Buffering
Leuconostoc/Radish Root Ferment Filtrate
Antimicrobial
Ethylhexylglycerin
Skin ConditioningPalmitoyl Tripeptide-5
Skin Conditioning
Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate
Skin ConditioningPalmitoyl Tetrapeptide-72 Amide
Skin Conditioning
Tetrapeptide-21
Skin Conditioning
Tetrapeptide-4
Skin Conditioning
Magnesium Chloride
Water, Glycerin, Methylpropanediol, Xanthan Gum, Undaria Pinnatifida Cell Culture Extract, Caprylyl Glycol, S-Mu-Conotoxin Cniiic Acetate, Butylene Glycol, Phenylpropanol, Citric Acid, Leuconostoc/Radish Root Ferment Filtrate, Ethylhexylglycerin, Palmitoyl Tripeptide-5, Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate, Palmitoyl Tetrapeptide-72 Amide, Tetrapeptide-21, Tetrapeptide-4, Magnesium Chloride
Key Ingredients
Benefits
Concerns
Ingredients Explained
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!
Learn more about WaterGlycerin (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.
Learn more about GlycerinMethylpropanediol is a synthetic solvent and humectant.
As a solvent, it helps dissolve other ingredients, helping to evenly distribute ingredients throughout the product. This ingredient has also been shown to have antimicrobial properties which makes it a preservative booster.
Methylpropanediol is able to add a bit of moisture to the skin. It also helps other ingredients be better absorbed into the skin, such as salicylic acid.
Learn more about MethylpropanediolXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumWe don't have a description for Undaria Pinnatifida Cell Culture Extract yet.
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).
Learn more about Caprylyl GlycolWe don't have a description for S-Mu-Conotoxin Cniiic Acetate yet.
Butylene 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 GlycolPhenylpropanol is a fragrance.
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.
Read more about some other popular AHA's here:
Learn more about Citric AcidLeuconostoc/Radish Root Ferment Filtrate is a natural preservative. It comes from fermenting radish roots with a bacteria called leuconostoc. The trade name for this ingredient is Leucidal.
Leuconostoc comes from lactic acid.
This ingredient has antimicrobial properties and helps prevent the growth of bacteria in a product.
Leuconostoc is used to make the traditional Korean side-dish, kimchi. It is also used to make sourdough bread (both incredibly yummy foods).
Learn more about Leuconostoc/Radish Root Ferment FiltrateEthylhexylglycerin 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.
Learn more about EthylhexylglycerinPalmitoyl Tripeptide-5 is a synthetic signal lipopeptide. This just means it is a three amino acid chain bolted onto a palmitic acid tail so it can slip through the skin's lipid barrier.
This peptide has a "build more, lose less" approach.
It's designed to mimic the collagen-stimulating activity in your skin by copying a snippet of one of your skin's own matrix proteins. This nudges fibroblasts into making more collagen while inhibiting the enzyme that breaks down skin protein.
The manufacturer's in vivo study of 45 volunteers found 1% and 2.5% reduced the appearance of wrinkles by 7% and 12% respectively, after using it twice daily for 84 days.
This is in the expected range for peptides; they're slow and cumulative actives and not overnight fixers.
Typical use levels range from 1-3% and this ingredient gets along with pretty much everything.
On the fungal acne front:
Although palmitic acid sits in the chain length that Malassezia can feed on, this ingredient has it locked in an amine bond. This makes it hard for Malassezia to access as a source of food, and therefore fungal acne safe.
We don't have a description for Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate yet.
Palmitoyl Tetrapeptide-72 Amide is a peptide.
Tetrapeptide-21 is a signal peptide. It helps boost collagen, hyaluronic acid, and fibronectin.
Fibronectin is a protein found in our skin's extracellular matrix that plays a role in cell adhesion, tissue repair, and wound healing.
Tetrapeptide-21 works by mimicking skin-protein breakdown signals, telling the skin to produce new structural proteins like collagen.
Preliminary studies show it works better than matrixyl and produced twice the amount of collagen in lab tests.
Learn more about Tetrapeptide-21Tetrapeptide-4 is a peptide.
Magnesium chloride is a mineral salt made from magnesium and chloride. It is mainly used to control product stability and texture in cosmetics.
This ingredient can also play a role in soothing the skin and supporting normal skin function.
Magnesium chloride is water-soluble, generally well tolerated, and does not act as a strong “active” ingredient on its own.
Learn more about Magnesium ChlorideReviews
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Where it's from
One. Two. Free! is a German brand
Often compared with
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· Updated November 1, 2024 • Added by ZuberoaBarragn_151
