Theramid C-Tetra E.F.
COSRX The Vitamin C 23 Serum
Versus

Theramid C-Tetra E.F. Versus COSRX The Vitamin C 23 Serum

Serum
Serum
Spanish Brand
Korean Brand

Updated on August 07, 2024

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, sensitive skin, reducing pores, 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 needs an update? Let us know.

New Comparison

Ingredient Info

Click any item below to learn more and see relevant ingredients

Theramid C-Tetra E.F. 21 ingredients

COSRX The Vitamin C 23 Serum 34 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

Theramid C-Tetra E.F. 21 ingredients

COSRX The Vitamin C 23 Serum 34 ingredients

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
C-Tetra E.F.

Water

Skin Conditioning

Ascorbyl Tetraisopalmitate

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Dark Spots IconNot safe for Fungal Acne Icon

Propanediol

Solvent
Helps hydrate Dry Skin Icon

Ascorbyl Glucoside

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps brighten skin Icon

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconGood for Scar Healing IconHelps brighten skin Icon

Tricaprylin

Masking
Fragrance Icon

Methylpropanediol

Solvent

Glycine Soja Seed Extract

Skin Conditioning
Helps reduce irritation IconGood for Dark Spots Icon

Tocopheryl Acetate

Antioxidant
0 / 0 Vitamin E IconAntioxidant Icon

Ascorbyl Methylsilanol Pectinate

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconHelps brighten skin Icon

Ferulic Acid

Antimicrobial
Antioxidant IconHelps with Anti-Aging IconGood for Dark Spots Icon

Lecithin

Emollient
Helps hydrate Dry Skin Icon

Sclerotium Gum

Emulsion Stabilising

Pullulan

Xanthan Gum

Emulsifying

Silica

Abrasive
Exfoliant IconMay worsen Eczema IconMay worsen Rosacea Icon

Sodium Hydroxide

Buffering

Sodium Citrate

Buffering

Citric Acid

Buffering
AHA IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconHelps brighten skin IconMay worsen Rosacea Icon

Sodium Benzoate

Masking
Preservative Icon

Potassium Sorbate

Preservative
Preservative Icon

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

The Vitamin C 23 Serum

Water

Skin Conditioning

Ascorbic Acid 23%

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon

Propanediol

Solvent
Helps hydrate Dry Skin Icon

Dimethicone

Emollient
1 / 0 Silicon Icon

Tromethamine

Buffering

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Scar Healing Icon

Ethyl Ether

Solvent
0 / 0

Squalane

Emollient
1 / 0 Helps hydrate Dry Skin Icon

Caffeine

Skin Conditioning
Helps reduce irritation IconHelps with Anti-Aging Icon

Sodium Chloride

Masking
Can worsen Dry Skin IconBad for Acne Prone Skin IconMay worsen Rosacea Icon

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid IconHelps hydrate Dry Skin Icon

Sodium Sulfite

Preservative
Preservative Icon

Disodium EDTA

Glutathione

Good for Dark Spots Icon

Adenosine

Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Scar Healing Icon

Acetyl Glucosamine

Skin Conditioning

Gardenia Florida Fruit Extract

Skin Conditioning

Allantoin

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Scar Healing Icon

Dextrin

Absorbent

Tocotrienols

Skin Conditioning

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing Icon

Elaeis Guineensis Oil

Emollient
Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin Icon

Arginine

Masking
Good for Scar Healing IconNot safe for Fungal Acne Icon

Niacinamide

Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin Icon

Pentylene Glycol

Skin Conditioning

Alcohol Denat.

Antimicrobial
Alcohol IconCan worsen Dry Skin IconMay worsen Oily Skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon

Helianthus Annuus Seed Oil

Emollient
0 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Glycyrrhiza Glabra Root Extract

Bleaching
Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Dark Spots Icon

Methyl Trimethicone

Skin Conditioning
Silicon Icon

Carthamus Tinctorius Seed Oil

Masking
0-2 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Camellia Japonica Seed Oil

Emollient
Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Daucus Carota Sativa Root Extract

Skin Conditioning
Helps reduce irritation Icon

Beta-Carotene

Skin Conditioning

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 Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Propanediol
Solvent

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin. 

It’s 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 Propanediol
Water
Skin Conditioning, Solvent

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 Water

Ingredient Ratings

Here's what our community thinks of the ingredients in these products.

C-Tetra E.F.
10
10
10
liked
mixed
disliked
Unlock with Premium
The Vitamin C 23 Serum
10
10
10
liked
mixed
disliked
Unlock with Premium

When to use

Theramid C-Tetra E.F. 21 ingredients

COSRX The Vitamin C 23 Serum 34 ingredients

35 Routines
94% use in am
6% use in pm
86% use every day
When to use See routines that use it ->
629 Routines
76% use in am
24% use in pm
92% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

Theramid C-Tetra E.F. 21 ingredients

2.00
Overall rating
5
4
3
2
1
What people say
Absorbs Well 100% Doesn't Work 100% Expensive 100%

COSRX The Vitamin C 23 Serum 34 ingredients

3.57
Overall rating
5
4
3
2
1
What people say
Works Well 42% Oily 33% Strong Scent 33%
See all reviews for The Vitamin C 23 Serum
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