COSRX The Vitamin C 13 Serum vs The Derma Co 0.3% Retinol Serum

COSRX

The Derma Co

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

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

Serum

25 ingredients

27 ingredients

Brand price

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

Brand price

INR 799.00 · checked 5 Oct 2026 · brand's site

No retailer listed yet

Brand from South Korea

Brand from India

At a Glance

They come out differently on Silicone-free, 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

Vitamin C derivative (stable)1
Stable derivatives of ascorbic acid.
Tetrahexyldecyl Ascorbate
Polysorbates (Tween emulsifiers)1
Polysorbate (Tween) emulsifiers.
Polysorbate 20
Retinoid1
Vitamin A derivatives that speed cell turnover.
Retinol
Vitamin C1
Vitamin C in any form: an antioxidant and brightener.
Tetrahexyldecyl Ascorbate

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

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

Show highlights for:

These ingredients are found in both products.

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

Pentylene Glycol
Skin Conditioning, Solvent
1,2-Dihydroxypentane
Learn more about Pentylene Glycol →

Each product against its closest dupes.