Updated on June 28, 2024
Overview
What they are
These products are both cruelty-free and reef safe . They have a total of 4 ingredients in common
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, fragrances, parabens or sulfates
What's Inside
They both contain oils
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
COSRX The Vitamin C 23 Serum 34 ingredients
COSRX The Retinol 0.5 Oil 10 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
COSRX The Vitamin C 23 Serum 34 ingredients
COSRX The Retinol 0.5 Oil 10 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAscorbic Acid 23%
Antioxidant
Propanediol
Solvent
Dimethicone
Emollient
Tromethamine
BufferingPanthenol
Skin Conditioning
Ethyl Ether
SolventSqualane
Emollient
Caffeine
Skin Conditioning
Sodium Chloride
Masking
Sodium Hyaluronate
Humectant
Sodium Sulfite
Preservative
Disodium EDTA
Glutathione
Adenosine
Skin Conditioning
Acetyl Glucosamine
Skin ConditioningGardenia Florida Fruit Extract
Skin ConditioningAllantoin
Skin Conditioning
Dextrin
AbsorbentTocotrienols
Skin ConditioningTocopherol
Antioxidant
Elaeis Guineensis Oil
Emollient
Butylene Glycol
Humectant
Arginine
Masking
Niacinamide
Smoothing
Pentylene Glycol
Skin ConditioningAlcohol Denat.
Antimicrobial
Helianthus Annuus Seed Oil
Emollient
Glycyrrhiza Glabra Root Extract
Bleaching
Methyl Trimethicone
Skin Conditioning
Carthamus Tinctorius Seed Oil
Masking
Camellia Japonica Seed Oil
Emollient
Daucus Carota Sativa Root Extract
Skin Conditioning
Beta-Carotene
Skin ConditioningWater, Ascorbic Acid 23%, Propanediol, Dimethicone, Tromethamine, Panthenol, Ethyl Ether, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus Seed Oil, Glycyrrhiza Glabra Root Extract, Methyl Trimethicone, Carthamus Tinctorius Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa Root Extract, Beta-Carotene
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Squalane is an emollient that helps the skin hold onto moisture. It's an oily liquid that occurs naturally in certain types of fish and plant oils.
Because squalane boosts hydration in the skin, it also comes with plenty of benefits: it is an antioxidant and can help fight free radicals and skin damage. Squalane is also found to have a detoxifying effect when applied.
Squalane comes from squalene, which occurs naturally within the sebum of our skin. It is one of the oils our skin produces to keep itself hydrated. Squalane is the hydrogenated version of squalene and has a longer shelf life.
Research shows that squalane is non-irritating (even at 100% concentration).
In general, it's a fantastic ingredient. It does a great job at hydrating the skin, and it's suitable for those with sensitive skin.
The source of squalane may impact malassezia / fungal acne. This is because olive oil derived squalane can contain impurities such as fatty acids and plant waxes. Sugarcane derived squalane is recommended for anyone with malassezia concerns.
Is squalane vegan?
This depends on the source. Squalane can be derived from both plants and animals. Most squalane used in skincare comes from plants.
Please note: the source of squalane is only known if disclosed by the brand. We recommend reaching out to the brand if you have any questions about their squalane.
Read more about squalene with an "e".
Is squalane an oil?
Squalane is often called an oil, but it’s technically not; it’s a hydrocarbon, meaning it’s only made of carbon and hydrogen, unlike true oils which are triglycerides made of fatty acids and glycerol.
The term “oil-free” isn’t regulated, so companies can define it however they want. Some exclude all oils, while others just avoid mineral oil or comedogenic oils.
While some people avoid oils thinking they cause breakouts, the right kind of oil (or oil-like ingredient like squalane) can actually help balance and hydrate your skin. It’s worth testing out simple oils or squalane to see what works best for your skin.
Learn more about SqualaneWe don't have a description for Tocotrienols yet.
Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolElaeis Guineensis Oil comes from the African Palm tree. This tree is native to Western and Southwestern Africa.
This oil is rich in antioxidants such as Vitamin E. Antioxidants may help with anti-aging.
The Vitamin E and fatty acid content give palm oil a skin-hydrating property. Emollients help trap moisture in by creating a film on the skin.
Palm oil is created by either squeezing the fruit or crushing the kernel at the center of the fruit. In the 1800s, archaeologists discovered a 6000 year old Egyptian tomb containing palm oil.
Palm oil is controversial due to its social and environmental impacts. Several organizations are working to make palm oil harvest more sustainable, such as the RSPO.
Learn more about Elaeis Guineensis OilIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
COSRX The Vitamin C 23 Serum 34 ingredients
COSRX The Retinol 0.5 Oil 10 ingredients
Reviews
Here's what our community thinks
COSRX The Vitamin C 23 Serum 34 ingredients
I didn't like the consistency of this serum at all.
It felt like I was putting oil to my face, but since I always use the whole product to see results this did nothing to me other than feeling uncomfortable.
Cured my acne scars
I had mix feelings when I first bought this as I read that the smell can be off-putting. But I am glad I bought it. My acne scars faded a lot more after 3 days of using it and saw great results in one week. It also didn't break me out despite containing alcohols and oils. It does sting a little on the first application but doesn't irritate my skin. The smell can be quite strong Show more
COSRX The Retinol 0.5 Oil 10 ingredients
Bought this for my face but saw zero results. Now I'm using this for my uner eyes.
Broke me out
I have oily and acne prone skin and my face was on the road to recovery. I thought adding a retinol was a good idea and they marketed that this retinol oil is good for any skin type even though it is oily. It broke me out and gave me a scar within a week. It gave me an acne that was deep inside of my skin. I wouldnt recommend it to oily and acne prone skin people.
