Disclosure: This page may contain affiliate links. Read our full disclosure policy.

Paula's Choice
25% Vitamin C + Glutathione Clinical Serum

Versus

Medik8
C-Tetra Advanced Gel-Serum

Product category and function

25% Vitamin C + Glutathione Clinical Serum

C-Tetra Advanced Gel-Serum

Serums/Treatments	Serums/Treatments
Concentrated formulas for hydrating and addressing skin issues.	Concentrated formulas for hydrating and addressing skin issues.
----	----

Ingredient highlights

25% Vitamin C + Glutathione Clinical Serum

C-Tetra Advanced Gel-Serum

Ingredient info	Ingredient info
Alcohol-free Paraben-free SLS-free Mica-free Fragrance-free	Alcohol-free Paraben-free SLS-free Mica-free Fragrance-free

Full ingredient list

25% Vitamin C + Glutathione Clinical Serum

C-Tetra Advanced Gel-Serum

No. of common ingredients = 0
Aqua/water/eau, tetrahexyldecyl ascorbate, dimethicone, glycerin, c9-12 alkane, ascorbyl glucoside, silica, pyrus malus (apple) fruit extract, hydrogenated lecithin, polyglyceryl-6 polyricinoleate, acrylates/c10-30 alkyl acrylate crosspolymer, xanthan gum, oryza sativa (rice) bran extract, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, cetyl alcohol, caprylyl glycol, lysine carboxymethyl cysteinate, coco-caprylate/caprate, tocopherol, glutathione, sodium citrate, sodium phytate, hexylene glycol, ethylhexylglycerin, helianthus annuus (sunflower) seed extract, urea, mannitol, caprylic/capric triglyceride, sodium pca, rosmarinus officinalis (rosemary) leaf extract, polysorbate 60, sorbitan isostearate, trehalose, ascorbic acid, glucose, vanilla planifolia fruit extract, polyquaternium-51, ergothioneine, triacetin, sodium hyaluronate, phenoxyethanol 12	Water, tetrahexyldecyl ascorbate, isododecane, propanediol, acetyl glucosamine, squalane, tocopherol, acetyl zingerone, camellia sinensis (green tea) leaf vesicles, hydroxyacetophenone, sodium hyaluronate, cellulose, avena sativa (oat) kernel extract, glycerin, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, citrus grandis (grapefruit) peel oil, sucrose stearate, tetrasodium glutamate diacetate, ethylhexylglycerin, acrylates/c10-30 alkyl acrylate crosspolymer, xanthan gum, sodium benzoate, cellulose gum, 1,2-hexanediol, polysorbate 60, sorbitan isostearate, citric acid, phenoxyethanol, citral, linalool, limonene.

No. of common ingredients = 0

Total Number of ingredients = 41

Total Number of ingredients = 31

Aqua/water/eau, tetrahexyldecyl ascorbate, dimethicone, glycerin, c9-12 alkane, ascorbyl glucoside, silica, pyrus malus (apple) fruit extract, hydrogenated lecithin, polyglyceryl-6 polyricinoleate, acrylates/c10-30 alkyl acrylate crosspolymer, xanthan gum, oryza sativa (rice) bran extract, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, cetyl alcohol, caprylyl glycol, lysine carboxymethyl cysteinate, coco-caprylate/caprate, tocopherol, glutathione, sodium citrate, sodium phytate, hexylene glycol, ethylhexylglycerin, helianthus annuus (sunflower) seed extract, urea, mannitol, caprylic/capric triglyceride, sodium pca, rosmarinus officinalis (rosemary) leaf extract, polysorbate 60, sorbitan isostearate, trehalose, ascorbic acid, glucose, vanilla planifolia fruit extract, polyquaternium-51, ergothioneine, triacetin, sodium hyaluronate, phenoxyethanol

Water, tetrahexyldecyl ascorbate, isododecane, propanediol, acetyl glucosamine, squalane, tocopherol, acetyl zingerone, camellia sinensis (green tea) leaf vesicles, hydroxyacetophenone, sodium hyaluronate, cellulose, avena sativa (oat) kernel extract, glycerin, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, citrus grandis (grapefruit) peel oil, sucrose stearate, tetrasodium glutamate diacetate, ethylhexylglycerin, acrylates/c10-30 alkyl acrylate crosspolymer, xanthan gum, sodium benzoate, cellulose gum, 1,2-hexanediol, polysorbate 60, sorbitan isostearate, citric acid, phenoxyethanol, citral, linalool, limonene.

Notable ingredients

25% Vitamin C + Glutathione Clinical Serum

C-Tetra Advanced Gel-Serum

Soothing: Rosmarinus officinalis (rosemary) leaf extract

Antioxidant: Ascorbic acid, Ascorbyl glucoside, Ergothioneine, Rosmarinus officinalis (rosemary) leaf extract, Tocopherol, Tetrahexyldecyl ascorbate, Vanilla planifolia fruit extract

Solvent: Aqua/water/eau, C9-12 alkane, Caprylic/capric triglyceride, Glycerin, Hexylene glycol, Triacetin

Skin brightening: Acetyl glucosamine

Antioxidant: Acetyl zingerone, Avena sativa (oat) kernel extract, Hydroxyacetophenone, Tocopherol, Tetrahexyldecyl ascorbate

Solvent: Water, 1,2-hexanediol, Glycerin, Limonene, Propanediol, Isododecane

Load all

Ingredients with their functions

25% Vitamin C + Glutathione Clinical Serum

C-Tetra Advanced Gel-Serum

Aqua/water/eau

Also-called: Aqua, Aqua/Water, Water/Aqua/Eau, Aqua/Water/Eau | Function: Skin conditioning, Solvent

Water serves as a fundamental component in skincare products, often listed as the first ingredient, which means it's the most abundant. It acts as a solvent, helping to dissolve other ingredients and facilitate the application and absorption of products.

Tetrahexyldecyl ascorbate

Function: Skin conditioning, Antioxidant

We don’t have a detailed description of this ingredient yet.

Dimethicone

Function: Emollient/Moisturizer, Skin protecting, Skin conditioning

We don’t have a detailed description of this ingredient yet.