Here's our complete breakdown comparing the ingredients, attributes, and more of Theramid C-Tetra E.F. versus COSRX The Vitamin C 23 Serum .
Last updated on March 07, 2024. Published on November 23, 2022
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 2 ingredients in common
Cool Features
They both contain Vitamin C and Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, parabens or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Price
Ingredient Info
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
Alcohol Free
This product is free of harsh alcohols 🎉
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
Contains Alcohol
Ingredients in this product that are types of alcohol:
Contains Silicon
Ingredients in this product that are types of silicon:
Fragrance Free
This product is free of fragrances 🎉
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
At a glance
Click on any of the items below to learn more
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
Notable Ingredients
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 4 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 4 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Concerns
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
Water • Ascorbyl Tetraisopalmitate • Propanediol • Ascorbyl Glucoside • Glycerin • Tricaprylin • Methylpropanediol • Glycine Soja Seed Extract • Tocopheryl Acetate • Ascorbyl Methylsilanol Pectinate • Ferulic Acid • Lecithin • Sclerotium Gum • Pullulan • Xanthan Gum • Silica • Sodium Hydroxide • Sodium Citrate • Citric Acid • Sodium Benzoate • Potassium Sorbate
Water • 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 Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterTheramid C-Tetra E.F. contains this as ingredient number 1.
COSRX The Vitamin C 23 Serum contains this as ingredient number 1.
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.
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 PropanediolTheramid C-Tetra E.F. contains this as ingredient number 3.
COSRX The Vitamin C 23 Serum contains this as ingredient number 3.
Here's what our community thinks of the ingredients in these two products.
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
Reviews
Here's what our community thinks
Theramid C-Tetra E.F. 21 ingredients
COSRX The Vitamin C 23 Serum 34 ingredients
laila.21
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...
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.
ChienYun_CY
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...
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 when you first spread it on, but it slowly goes away after awhile.
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