Kiehl's Powerful-Strength Vitamin C Serum Versus Kiehl's Ferulic Brew Antioxidant Facial Treatment with Lactic Acid
Overview
What they are
These products are both reef safe . They have a total of 4 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 common allergens, fragrances and oils
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
Kiehl's Ferulic Brew Antioxidant Facial Treatment with Lactic Acid 31 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
Kiehl's Ferulic Brew Antioxidant Facial Treatment with Lactic Acid 31 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 ConditioningArginine
Masking
Saccharomyces/Rice Ferment Filtrate
Skin Conditioning
Dicaprylyl Ether
Emollient
Glycerin
Humectant
Pentylene Glycol
Skin ConditioningLactic Acid
Buffering
Propanediol
Solvent
Squalane
Emollient
Butylene Glycol
Humectant
Sodium Chloride
Masking
Tocopherol
Antioxidant
Ascorbyl Glucoside
Antioxidant
Salicylic Acid
Masking
Ferulic Acid
Antimicrobial
Caramel
Cosmetic ColorantAdenosine
Skin Conditioning
Lavandula Hybrida Oil
Emollient
Helianthus Annuus Seed Oil
Emollient
Cupressus Sempervirens Leaf/Nut/Stem Oil
Emollient
Anthemis Nobilis Flower Oil
Masking
Linalool
Perfuming
Pelargonium Graveolens Flower Oil
Masking
Brassica Campestris Extract
Skin ConditioningBrassica Campestris Sprout Extract
HumectantMentha Piperita Oil
Masking
Sodium Hyaluronate
Humectant
Citronellol
Perfuming
Geraniol
Perfuming
Limonene
Perfuming
Origanum Majorana Leaf Oil
Masking
Water, Arginine, Saccharomyces/Rice Ferment Filtrate, Dicaprylyl Ether, Glycerin, Pentylene Glycol, Lactic Acid, Propanediol, Squalane, Butylene Glycol, Sodium Chloride, Tocopherol, Ascorbyl Glucoside, Salicylic Acid, Ferulic Acid, Caramel, Adenosine, Lavandula Hybrida Oil, Helianthus Annuus Seed Oil, Cupressus Sempervirens Leaf/Nut/Stem Oil, Anthemis Nobilis Flower Oil, Linalool, Pelargonium Graveolens Flower Oil, Brassica Campestris Extract, Brassica Campestris Sprout Extract, Mentha Piperita Oil, Sodium Hyaluronate, Citronellol, Geraniol, Limonene, Origanum Majorana Leaf Oil
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Glycerin 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 GlucosideAdenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.
Studies have found adenosine may also help with wound healing.
In skincare products, Adenosine is usually derived from yeast.
Learn more about AdenosineLimonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about LimoneneIngredient 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
Kiehl's Ferulic Brew Antioxidant Facial Treatment with Lactic Acid 31 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.
