COSRX The Vitamin C 13 Serum vs The Inkey List 10% Azelaic Acid Serum for Redness Relief

COSRX

The Inkey List

A serum built around Vitamin C and Vitamin C, for barrier repair and hydration.

A serum built around Azelaic acid, for pollution defence and hydration.

Serum

25 ingredients

17 ingredients

Brand price

USD 21.00 · checked 25 Sept 2026 · brand's site

Brand price

USD 20.00 · checked 26 Sept 2026 · brand's site

No retailer listed yet

Brand from South Korea

Brand country not recorded

At a Glance

They come out differently on Pore-clogger-free and Oil-free; those rows are shaded. Tap any answer to see why.

Face oil1
An oil formulated to be used on the face.
Squalane
Vitamin E1
Tocopherols — fat-soluble antioxidants.
Tocopherol
Vitamin C (L-ascorbic acid)1
L-ascorbic acid, the unesterified form of vitamin C.
Ascorbic Acid
Vitamin C derivative (stable)1
Stable derivatives of ascorbic acid.
3-O-Ethyl Ascorbic Acid

Polysorbates (Tween emulsifiers)1
Polysorbate (Tween) emulsifiers.
Polysorbate 60
Azelaic acid1
Works on acne, redness and pigmentation at once.
Azelaic Acid

Hydrating6
Boosts hydration and relieves dry, tight skin.
Acetyl Glucosamine, Butylene Glycol, Panthenol, Sodium Hyaluronate, Squalane, Tocopherol
Barrier Repair7
Strengthens and restores the skin's natural barrier.
Allantoin, Elaeis Guineensis Oil, Glycyrrhiza Glabra Root Extract, Niacinamide, Panthenol, Squalane, Tocopherol
Reduces Irritation3
Eases discomfort and supports skin resilience.
Allantoin, Glycyrrhiza Glabra Root Extract, Panthenol
Redness Reducing3
Soothes visible redness and calms irritation.
Allantoin, Glycyrrhiza Glabra Root Extract, Niacinamide

Hydrating2
Boosts hydration and relieves dry, tight skin.
Glycerin, Propanediol
Barrier Repair2
Strengthens and restores the skin's natural barrier.
Allantoin, Glycerin
Reduces Irritation1
Eases discomfort and supports skin resilience.
Allantoin
Redness Reducing2
Soothes visible redness and calms irritation.
Allantoin, Azelaic Acid

May Trigger Acne1
Can clog pores or trigger breakouts.
Tocopherol
May Worsen Seborrheic Dermatitis2
May feed the yeast involved in seborrheic dermatitis.
Acetyl Glucosamine, Elaeis Guineensis Oil
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
Tocopherol
May Worsen Oily Skin2
May increase shine or excess oil.
Elaeis Guineensis Oil, Squalane

May Trigger Acne1
Can clog pores or trigger breakouts.
Sorbitan Isostearate
May Worsen Seborrheic Dermatitis2
May feed the yeast involved in seborrheic dermatitis.
Polysorbate 60, Sorbitan Isostearate
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
Sorbitan Isostearate

Show highlights for:

Aqua
Solvent
0 / —
Azelaic Acid
Buffering
- Azelaic acid
- Acne Fighting
- Dark Spots
- Even Tone
- Redness Reducing
Propanediol
Viscosity Controlling
0-1 / —
- Hydrating
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion Stabilising
Phenoxyethanol
Preservative
0 / —
Acacia Senegal Gum
Fragrance
Xanthan Gum
Cleansing
0-1 / —
Allantoin (in both products)
Skin Conditioning
0 / 0
- Reduces Irritation
- Smoothing
Glycerin
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Ethylhexylglycerin
Skin Conditioning

These ingredients are found in both products.

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

Gardenia Florida Fruit Extract
Colorant, Skin Conditioning
Gardenia Florida Fruit Extract is the extract of the fruit of Gardenia florida. The accepted scientific name for Gardenia florida is Gardenia jasminoides.
Learn more about Gardenia Florida Fruit Extract →
Allantoin
Skin Conditioning, Skin Protecting, Soothing
Urea, (2,5-dioxo-4-imidazolidinyl)-
Learn more about Allantoin →