Kiehl's Powerful-Strength Vitamin C Serum Versus Estée Lauder Perfectionist Pro Serum Rapid Brightening Treatment with Ferment² + Vitamin C
Updated on June 28, 2024
Overview
What they are
These products are both reef safe serums. They have a total of 3 ingredients in common
Cool Features
They both contain hyaluronic acid and Vitamin C
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 harsh alcohols, parabens or sulfates
What's Inside
They both contain fragrances and silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Estée Lauder Perfectionist Pro Serum Rapid Brightening Treatment with Ferment² + Vitamin C 59 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
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Estée Lauder Perfectionist Pro Serum Rapid Brightening Treatment with Ferment² + Vitamin C 59 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Propylene Glycol
Humectant
Dimethicone
Emollient
Glycerin
Humectant
Ascorbic Acid
Antioxidant
Ethylhexyl Palmitate
Emollient
Cetyl PEG/PPG-10/1 Dimethicone
Emulsifying
Dimethicone Crosspolymer
Emulsion StabilisingAscorbyl Glucoside
Antioxidant
Cyclohexasiloxane
Emollient
Hydroxyethylpiperazine Ethane Sulfonic Acid
BufferingLauroyl Lysine
Skin ConditioningAcrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer
Polysilicone-11
Adenosine
Skin Conditioning
Hydrolyzed Hyaluronic Acid
Humectant
Limonene
Perfuming
Isobutane
Citrus Aurantium Dulcis Peel Oil
Masking
Citrus Limon Peel Oil
Masking
Citral
Perfuming
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Propylene Glycol, Dimethicone, Glycerin, Ascorbic Acid, Ethylhexyl Palmitate, Cetyl PEG/PPG-10/1 Dimethicone, Dimethicone Crosspolymer, Ascorbyl Glucoside, Cyclohexasiloxane, Hydroxyethylpiperazine Ethane Sulfonic Acid, Lauroyl Lysine, Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer, Polysilicone-11, Adenosine, Hydrolyzed Hyaluronic Acid, Limonene, Isobutane, Citrus Aurantium Dulcis Peel Oil, Citrus Limon Peel Oil, Citral, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Water
Skin ConditioningButylene Glycol
Humectant
Glycerin
Humectant
Glycereth-26
Humectant
Isononyl Isononanoate
EmollientDimethicone
Emollient
Propanediol
Solvent
Ascorbyl Glucoside
Antioxidant
Algae Extract
Emollient
Sucrose
Humectant
Acetyl Glucosamine
Skin ConditioningHydroxyethyl Urea
Humectant
Lens Esculenta Fruit Extract
Skin ConditioningCitrullus Lanatus Fruit Extract
Skin Conditioning
Pyrus Malus Fruit Extract
Skin Conditioning
Saccharum Officinarum Extract
MoisturisingMyrtus Communis Leaf Extract
Perfuming
Avena Sativa Kernel Extract
Abrasive
Triticum Vulgare Germ Extract
Skin ConditioningHordeum Vulgare Extract
EmollientCladosiphon Okamuranus Extract
Skin ConditioningSalicylic Acid
Masking
Hydrolyzed Prunus Domestica
Skin ConditioningCaffeine
Skin Conditioning
Sodium Lactate
BufferingDipotassium Glycyrrhizate
Humectant
Squalane
Emollient
Oryzanol
Skin ConditioningResveratrol
Antioxidant
Sodium Hyaluronate
Humectant
Sodium PCA
Humectant
Ethylhexylglycerin
Skin ConditioningBis-PEG-18 Methyl Ether Dimethyl Silane
EmollientTocopheryl Acetate
Antioxidant
PEG-75
HumectantOleth-3 Phosphate
Sorbitol
Humectant
Caprylyl Glycol
EmollientOleth-3
EmulsifyingSodium Polyaspartate
HumectantOleth-5
Emulsifying
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingPropylene Glycol Caprylate
Skin ConditioningDextrin
AbsorbentYeast Extract
Skin Conditioning
Choleth-24
EmulsifyingCarbomer
Emulsion StabilisingSodium Hydroxide
BufferingCeteth-24
CleansingXanthan Gum
EmulsifyingParfum
Masking
Glyceryl Acrylate/Acrylic Acid Copolymer
HumectantCitric Acid
Buffering
Sodium Citrate
BufferingDisodium EDTA
BHT
Antioxidant
Potassium Sorbate
Preservative
Sodium Benzoate
Masking
Phenoxyethanol
Preservative
Water, Butylene Glycol, Glycerin, Glycereth-26, Isononyl Isononanoate, Dimethicone, Propanediol, Ascorbyl Glucoside, Algae Extract, Sucrose, Acetyl Glucosamine, Hydroxyethyl Urea, Lens Esculenta Fruit Extract, Citrullus Lanatus Fruit Extract, Pyrus Malus Fruit Extract, Saccharum Officinarum Extract, Myrtus Communis Leaf Extract, Avena Sativa Kernel Extract, Triticum Vulgare Germ Extract, Hordeum Vulgare Extract, Cladosiphon Okamuranus Extract, Salicylic Acid, Hydrolyzed Prunus Domestica, Caffeine, Sodium Lactate, Dipotassium Glycyrrhizate, Squalane, Oryzanol, Resveratrol, Sodium Hyaluronate, Sodium PCA, Ethylhexylglycerin, Bis-PEG-18 Methyl Ether Dimethyl Silane, Tocopheryl Acetate, PEG-75, Oleth-3 Phosphate, Sorbitol, Caprylyl Glycol, Oleth-3, Sodium Polyaspartate, Oleth-5, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Propylene Glycol Caprylate, Dextrin, Yeast Extract, Choleth-24, Carbomer, Sodium Hydroxide, Ceteth-24, Xanthan Gum, Parfum, Glyceryl Acrylate/Acrylic Acid Copolymer, Citric Acid, Sodium Citrate, Disodium EDTA, BHT, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Dimethicone is a type of synthetic silicone created from natural materials such as quartz.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
Learn more about DimethiconeGlycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinAscorbyl Glucoside is a stable form of Vitamin C. It is created by combining glucose from starch.
When applied to skin, Ascorbyl Glucoside turns into Ascorbic Acid.
Ascorbyl Glucoside is an antioxidant. Antioxidants help fight free-radicals, or molecules that may damage skin cells.
It can help to reduce redness, improve skin texture, reduce the effects of aging, reduce the visibility of dark spots, and brighten skin.
Read more about other types of Vitamin C:
Learn more about Ascorbyl GlucosideIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Estée Lauder Perfectionist Pro Serum Rapid Brightening Treatment with Ferment² + Vitamin C 59 ingredients
Reviews
Here's what our community thinks
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Actually noticed a difference in my fine lines with this product. The bottle also lasted me over a year with almost daily use.
