Published March 21, 2023 • Added by KalynnHarris_204
Overview
What it is
Serum with 27 ingredients that contains peptides
Cool Features
It is vegan, cruelty-free, and reef safe
Suited For
It has ingredients that are good for dry skin and brightening skin
Free From
It doesn't contain any oils, parabens, silicones or sulfates
Fun facts
Kosas is from United States. This product is used in 26 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.
Quick info
Free from
Safety & Ethics
American Brand
Ingredients, at a glance
What's in this product, and how it might affect your skin.
Notable Ingredients
Benefits
Concerns
Ingredients List
Dive into the full list of ingredients.
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.
Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.
Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
Phenethyl Alcohol is a colorless and aromatic alohol. It is naturally occuring in essential oils.
Hydrolyzed Rice Protein is protein extracted from rice. This ingredient is rich in antioxidants and peptides.
Polyglyceryl-6 Caprylate comes from caprylic acid and Polyglycerin-6. It is an emulsifier, emollient, and cleansing agent.
Polyglyceryl-3 Cocoate isn't fungal acne safe. It can be bad for dry skin.
Polyglyceryl-4 Caprate comes from Capric Acid and Polyglycerin-4. It is an emulsifier.
Polyglyceryl-6 Ricinoleate isn't fungal acne safe.
This is the synthetic salt of gluconic acid, a form of PHA and mild exfoliant.
You might know this ingredient as a sugar substitute in foods. It is a sugar alcohol with humectant properties.
Caprylic/Capric Triglyceride is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.
Maltodextrin is a polysaccharide. It is derived from starch such as rice, corn, wheat, or potato starch.
Lactobacillus Ferment is created by fermenting the Lactobacillus bacteria. It helps keep our skin's natural barrier and microbiome healthy.
This extract comes from the Roselle flower, or Hibiscus Sabdariffa. Roselle flowers are rich in antioxidants and have anti-aging benefits.
Glycine is an amino acid that helps build proteins. It is already present in our skin as our bodies produce them naturally.
Proline is an amino-acid. It helps moisturize the skin and plays an important role in creating proteins.
This ingredient is created by putting sodium hyaluronate through hydrolysis.
Palmitoyl Tripeptide-37 isn't fungal acne safe and is a peptide.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
Benzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.
Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Water, Propanediol, Pentylene Glycol, Glycerin, Phenethyl Alcohol, Hydrolyzed Rice Protein, Polyglyceryl-6 Caprylate, Polyglyceryl-3 Cocoate, Polyglyceryl-4 Caprate, Polyglyceryl-6 Ricinoleate, Sodium Gluconate, Erythritol, Hydrolyzed Pea Protein, Caprylic/Capric Triglyceride, Maltodextrin, Acacia Seyal Gum Extract, Lactobacillus Ferment, Artemisia Capillaris Flower Extract, Hibiscus Sabdariffa Flower Extract, Glycine, Proline, Hydrolyzed Sodium Hyaluronate, Palmitoyl Tripeptide-37, Potassium Sorbate, Citric Acid, Benzyl Alcohol, Sodium Benzoate
What the community thinks
Based on the number of likes and dislikes each ingredient has received.
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. Stay hydrated!
Learn more about WaterPropanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.
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 PropanediolPentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolGlycerin 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 GlycerinPhenethyl Alcohol is a colorless and aromatic alohol. It is naturally occuring in essential oils.
The scent of this ingredient is floral and often compared to rose.
Like other alcohols, this ingredient helps prevent the growth of bacteria. However, its main purpose is to impact a fragrance.
Learn more about Phenethyl AlcoholHydrolyzed Rice Protein is protein extracted from rice. This ingredient is rich in antioxidants and peptides.
Studies show this ingredient may help with blocking the melanin creation process when skin is exposed to UV.
Polyglyceryl-6 Caprylate comes from caprylic acid and Polyglycerin-6. It is an emulsifier, emollient, and cleansing agent.
Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating. Common ingredients include oils and water, which do not mix naturally. Emulsifiers have properties that help keep ingredients such as these together. There is emerging research that shows emulsifiers may also help in delivering ingredients into the skin.
As an emollient, polyglyceryl-6 caprylate helps soften skin.
Learn more about Polyglyceryl-6 CaprylatePolyglyceryl-3 Cocoate isn't fungal acne safe. It can be bad for dry skin.
Polyglyceryl-4 Caprate comes from Capric Acid and Polyglycerin-4. It is an emulsifier.
Emulsifiers help stabilize a product. They do this by preventing ingredients from separating, such as oils and water which do not mix naturally.
Polyglyceryl-6 Ricinoleate isn't fungal acne safe.
This is the synthetic salt of gluconic acid, a form of PHA and mild exfoliant.
It is mainly used to stabilize oil and butter formulations from going bad. Sodium gluconate is a humectant, pH regulator, and chelating agent.
Chelating agents help neutralize unwanted metals from affecting the formulation.
Sodium gluconate is water-soluble.
Learn more about Sodium GluconateYou might know this ingredient as a sugar substitute in foods. It is a sugar alcohol with humectant properties.
Humectants attract water to your skin (like glycerin or hyaluronic acid).
Fun fact: Erythritol can be naturally found in some fermented foods.
Learn more about ErythritolWe don't have a description for Hydrolyzed Pea Protein yet.
Caprylic/Capric Triglyceride is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.
Within a product, Caprylic Triglyceride can thicken the product and make spreadability easier by dissolving clumping compounds. An added benefit of Caprylic Triglyceride is its antioxidant properties.
Caprylic Triglyceride is made by combining glycerin with coconut oil, forming a clear liquid. Caprylic Triglyceride has not been found to be toxic for human use in concentrations under 50%.
While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this.
Learn more about Caprylic/Capric TriglycerideMaltodextrin is a polysaccharide. It is derived from starch such as rice, corn, wheat, or potato starch.
In food, Maltodextrin is used to improve the texture and thicken a product. Due to its structure, it can help create a gel texture. As an emulsion stabilizer, it helps keep the ingredients in a product together.
As a polysaccharide, Maltodextrin has moisturizing properties. Polysaccharides are a type of carbohydrate. The top layer of skin uses polysaccharides to retain water, keeping the skin hydrated.
Maltodextrin is water soluble and has a sweet taste.
Learn more about MaltodextrinWe don't have a description for Acacia Seyal Gum Extract yet.
Lactobacillus Ferment is created by fermenting the Lactobacillus bacteria. It helps keep our skin's natural barrier and microbiome healthy.
Studies show lactobacillus ferment to be effective at repairing the skin barrier. Having a healthy skin barrier helps keep your skin healthy and hydrated. It also protects against bad bacteria.
As a probiotic/prebiotic/postbiotic, Lactobacillus ferment can help regular our natural biome. In fact, one study found a lack of diversity in our natural skin biome can trigger acne.
Learn more about Lactobacillus FermentWe don't have a description for Artemisia Capillaris Flower Extract yet.
This extract comes from the Roselle flower, or Hibiscus Sabdariffa. Roselle flowers are rich in antioxidants and have anti-aging benefits.
Studies found the antioxidants in Roselle flowers to potentially help reduce UV-B damage.
Glycine is an amino acid that helps build proteins. It is already present in our skin as our bodies produce them naturally.
Glycine helps keep skin hydrated and reduce signs of aging. Amino acids help transport moisture throughout our skin; glycine already plays a role in helping keep our skin moisturized.
As collagen is made up of glycine and other amino acids, it is believed Glycine may help our skin produce more collagen. Collagen helps keep skin plump and firm.
Learn more about GlycineProline is an amino-acid. It helps moisturize the skin and plays an important role in creating proteins.
Proline is one of the building blocks for producing collagen. As we age, our bodies produce less collagen. Collagen helps the skin look plump and firm.
In medicine, proline is used as an osmoprotectant. This means it helps prevent oxidative degradation in other drugs.
Our bodies are able to produce proline naturally, but certain conditions may inhibit this production. In that case, proline can be obtained from eating egg whites, soy protein, dairy products, asparagus, mushrooms, and seaweed.
Learn more about ProlineThis ingredient is created by putting sodium hyaluronate through hydrolysis.
You might know this as 'mini' or 'ultra low-molecular weight' hyaluronic acid. The small molecule size means it is able to travel deeper in the skin.
According to studies, low molecular-weight hyaluronic acid can:
One study from 2011 found ultra-low weight HA to show pro-inflammatory properties. Another study from 2022 found it to downregulate UV-B induced inflammation.
Hydrolysis is a process of changing a molecule using water or enzymes.
This ingredient is water-soluble.
Learn more about Hydrolyzed Sodium HyaluronatePalmitoyl Tripeptide-37 isn't fungal acne safe and is a peptide.
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.
Learn more about Potassium SorbateCitric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidBenzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.
Benzyl Alcohol has both antibacterial and antioxidant properties. These properties help lengthen the shelf life of products. Benzyl Alcohol is a solvent and helps dissolve other ingredients. It can also improve the texture and spreadability.
Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is an astringent alcohol.
Using high concentrations of these alcohols are drying on the skin. They may strip away your skin's natural oils and even damage your skin barrier. Astringent alcohols may also irritate skin.
Other types of astringent alcohols include:
According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.
Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.
Learn more about Benzyl AlcoholSodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
Sodium Benzoate is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateCompared With
Here are some products that it's often compared with
More Kosas Products
See all Kosas productsMore Serums
See all serumsWe'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