La Roche-Posay Vitamin C12 Serum vs Kiehl's Vital Skin Strengthening Super Serum

La Roche-Posay

Kiehl's

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

Serum

29 ingredients

21 ingredients

Brand price

USD 44.99 · checked 25 Sept 2026 · brand's site

Brand price

INR 5600.00 · checked 8 Oct 2026 · brand's site

No retailer listed yet

Brand from France

Brand country not recorded

At a Glance

They come out differently on EU-allergen-free and Alcohol-free; those rows are shaded. Tap any answer to see why.

Vitamin E1
Tocopherols — fat-soluble antioxidants.
Tocopherol
Vitamin C (L-ascorbic acid)1
L-ascorbic acid, the unesterified form of vitamin C.
Ascorbic Acid
BHA1
Beta hydroxy acid — oil-soluble, so it works inside the pore.
Salicylic Acid
Salicylic acid1
The BHA used in acne treatment.
Salicylic Acid

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.
Ascorbyl Glucoside
Vitamin C2
Vitamin C in any form: an antioxidant and brightener.
Ascorbic Acid, Ascorbyl Glucoside

Hydrating6
Boosts hydration and relieves dry, tight skin.
Dimethicone, Glycerin, Hydrolyzed Hyaluronic Acid, Propylene Glycol, Sodium Hyaluronate, Tocopherol
Barrier Repair8
Strengthens and restores the skin's natural barrier.
C13-14 Isoparaffin, Caprylyl Glycol, Cyclohexasiloxane, Dimethicone, Glycerin, Pentaerythrityl Tetraethylhexanoate, Propylene Glycol, Tocopherol
Anti-Aging2
Softens lines and helps skin look youthful.
Adenosine, Ascorbic Acid
Firming1
Supports elasticity and bounce.
Adenosine

Hydrating4
Boosts hydration and relieves dry, tight skin.
Dimethicone, Glycerin, Hydrolyzed Hyaluronic Acid, Propylene Glycol
Barrier Repair5
Strengthens and restores the skin's natural barrier.
Cyclohexasiloxane, Dimethicone, Ethylhexyl Palmitate, Glycerin, Propylene Glycol
Anti-Aging2
Softens lines and helps skin look youthful.
Adenosine, Ascorbic Acid
Firming1
Supports elasticity and bounce.
Adenosine

May Trigger Acne1
Can clog pores or trigger breakouts.
Tocopherol
May Worsen Seborrheic Dermatitis3
May feed the yeast involved in seborrheic dermatitis.
Acetyl Dipeptide-1 Cetyl Ester, Laureth-7, PEG-20 Methyl Glucose Sesquistearate
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
Tocopherol
May Worsen Irritation3
May cause stinging, redness or sensitivity.
Alcohol Denat., Parfum, Tocopherol

May Trigger Acne1
Can clog pores or trigger breakouts.
Ethylhexyl Palmitate
May Worsen Seborrheic Dermatitis2
May feed the yeast involved in seborrheic dermatitis.
Ethylhexyl Palmitate, Lauroyl Lysine
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
Ethylhexyl Palmitate
May Worsen Irritation4
May cause stinging, redness or sensitivity.
Citral, Citrus Aurantium Dulcis Peel Oil, Citrus Limon Peel Oil, Limonene

Show highlights for:

Aqua
Solvent
0 / —
Ascorbic Acid (in both products)
Antioxidant
- Vitamin C
- Vitamin C (L-ascorbic acid)
- Anti-Aging
- Anti-Pollution
- Antioxidant
- Brightening
- Dark Spots
- Even Tone
Cyclohexasiloxane (in both products)
Emollient
0-1 / —
- Silicones
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Alcohol Denat.
Fragrance
0 / —
- Denatured alcohol
- May Worsen Dryness
- May Worsen Eczema
- May Worsen Irritation
- May Worsen Rosacea
Potassium Hydroxide
Buffering
0-1 / —
Polymethylsilsesquioxane
Opacifying
0-1 / —
- Silicones
Polysilicone-11 (in both products)
Film Forming
- Silicones
Dimethicone (in both products)
Emollient
1 / 0
- Silicones
- Barrier Repair
- Hydrating
- Smoothing
Propylene Glycol (in both products)
Humectant
0 / 0

Propylene Glycol (in both products)
Humectant
0 / 0
Dimethicone (in both products)
Emollient
1 / 0
- Silicones
- Barrier Repair
- Hydrating
- Smoothing
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Ascorbic Acid (in both products)
Antioxidant
- Vitamin C
- Vitamin C (L-ascorbic acid)
- Anti-Aging
- Anti-Pollution
- Antioxidant
- Brightening
- Dark Spots
- Even Tone
Ethylhexyl Palmitate
Emollient
4 / 0
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- May Trigger Acne
- May Worsen Keratosis Pilaris
- May Worsen Seborrheic Dermatitis
Cetyl Peg/Ppg-10/1 Dimethicone
Cleansing
0-1 / —
- Silicones
Dimethicone Crosspolymer
Emulsion Stabilising
0-1 / —
- Silicones
Ascorbyl Glucoside
Antioxidant
- Vitamin C
- Vitamin C derivative (stable)
- Antioxidant
- Brightening
- Dark Spots
Cyclohexasiloxane (in both products)
Emollient
0-1 / —
- Silicones
Hydroxyethylpiperazine Ethane Sulfonic Acid
Buffering
0-1 / —

These ingredients are found in both products.

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

Ascorbic Acid
Antioxidant, Buffering, Fragrance, Skin Conditioning
Ascorbic Acid is L-ascorbic acid.
Learn more about Ascorbic Acid →
Cyclohexasiloxane
Hair Conditioning, Emollient, Solvent
Cyclohexasiloxane is a silicone.
Learn more about Cyclohexasiloxane →
Glycerin
Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care, Perfuming, Humectant, Skin Protecting, Solvent, Viscosity Controlling
Glycerin may be plant, synthetic or animal depending on the supplier.
Learn more about Glycerin →
Polysilicone-11
Film Forming
Polysilicone-11 is a silicone.
Learn more about Polysilicone-11 →
Dimethicone
Antifoaming, Skin Conditioning, Emollient, Skin Protecting
Dimethicone is a silicone.
Learn more about Dimethicone →
Propylene Glycol
Fragrance, Humectant, Humectant, Skin Conditioning, Solvent, Viscosity Controlling
Propylene Glycol is the aliphatic alcohol that conforms generally to the formula
Learn more about Propylene Glycol →
Hydrolyzed Hyaluronic Acid
Hair Conditioning, Humectant, Skin Conditioning
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
Learn more about Hydrolyzed Hyaluronic Acid →
Adenosine
Skin Conditioning
6-Amino-9-beta-D-ribofuranosyl-9H-purine
Learn more about Adenosine →