Kiehl's Age Defender Power Serum Versus Kiehl's Powerful-Strength Vitamin C Serum
Overview
What they are
These products are both reef safe serums. They have a total of 6 ingredients in common
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin and scar healing
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain common allergens, fragrances, oils 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 Age Defender Power Serum 27 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
At a glance
Click on any of the items below to learn more
Kiehl's Age Defender Power Serum 27 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Notable Ingredients
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Benefits
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Concerns
This product contains 1 ingredient that may have this attribute:
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This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Notable Ingredients
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
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Ingredients Side-by-side
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.
5 Concerns
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.
Isononyl Isononanoate is a synthetic skin-conditioner and texture enhancer. It is created from nonanoic acid, a fatty acid found in cocoa and lavender oil.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Ammonium Polyacryloyldimethyl Taurate is a polymer made from ammonium salts. It helps add stability and texture to a product.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
This ingredient is a vegetable-derived protein made to mimic hydrolyzed collagen. It is created from soy, or glycine soja.
2 Concerns
Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Not safe for Fungal Acne
Glycine Soja Oil comes from the soybean. Glycine Soja is native to eastern Asia.
Caffeine is most associated with coffee, tea, and cacao. In skincare, it helps with calming inflammation and anti-aging.
Antioxidant 4 Benefits May cause irritation
Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Hydrolyzed Rice Protein is protein extracted from rice. This ingredient is rich in antioxidants and peptides.
Limonene is a fragrance that adds scent and taste to a formulation.
Biosaccharide Gum-1 is a sugar created from fermented sorbitol. Most sorbitol is made from potato starch.
Disodium EDTA plays a role in making products more stable by aiding other preservatives.
Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Fragrance
T-Butyl Alcohol it is most commonly used as a solvent.
Helps hydrate Dry Skin
Hydroxypalmitoyl Sphinganine helps your skin create more ceramides. This ingredient has been shown to boost skin hydration and improve the skin barrier.
2 Concerns
Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
EU Allergen
Citral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.
Water, Glycerin, Dimethicone, Alcohol Denat., Isononyl Isononanoate, Butylene Glycol, Ammonium Polyacryloyldimethyl Taurate, Phenoxyethanol, Pentylene Glycol, Hydrolyzed Soy Protein, Parfum, Hydroxypropyl Tetrahydropyrantriol, Propylene Glycol, Ruscus Aculeatus Root Extract, Glycine Soja Oil, Caffeine, Tocopherol, Hydrolyzed Rice Protein, Limonene, Biosaccharide Gum-1, Disodium EDTA, Adenosine, T-Butyl Alcohol, Hydroxypalmitoyl Sphinganine, Cryptomeria Japonica Bud Extract, Linalool, Citral
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
Antioxidant 6 Benefits
Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.
Ethylhexyl Palmitate is created from 2-ethylhexyl alcohol and palmitic acid. It is a fatty acid ester.
This ingredient is a high molecular weight silicone. It has emulsifying and skin conditioning properties.
Dimethicone Crosspolymer is a silicone created by modifying dimethicone with hydrocarbon side chains. Due to its large size, it does not penetrate skin. It is considered non-occlusive.
Antioxidant 6 Benefits
Ascorbyl Glucoside is a stable form of Vitamin C. It is created by combining glucose from starch.
Cyclohexasiloxane is a type of silicone more commonly known as D6. It is an emollient and solvent.
This ingredient comes from a fatty acid (lauric acid) and amino acid (lysine). It is used to add a silky feel to cosmetics.
We don't have a description for Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer.
Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Hydrolyzed Hyaluronic Acid is a form of hyaluronic acid. It is created by the hydrolysis of hyaluronic acid with a high molecular weight. Once created, Hydrolyzed Hyaluronic Acid has a low molecular weight.
Limonene is a fragrance that adds scent and taste to a formulation.
Citrus Aurantium Dulcis Peel Oil is oil from the peel of an orange fruit.
Oil EU Allergen
Citrus Limon Peel Oil is created from the peels of the lemon. It is used to add a lemon-scent to products. Lemon peel oil also has antibacterial, antifungal, and antioxidant properties. However, it may also cause phototoxicity and sensitize skin.
EU Allergen
Citral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate (long name, huh?) is a synthetic 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
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 GlycerinDimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.
Dimethicone has been found increase absorption in skin, boosting the benefits of other ingredients. While there is concern for the safety of dimethicone, the levels used in skincare are safe for use.
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.
This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.
Those with sensitive skin or conditions may deliver a rash when using this ingredient.
Learn more about Propylene GlycolLimonene 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 LimoneneAdenosine 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 AdenosineCitral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.
The EU mandates Citral be listed separately as a fragrance. It is a known allergen and may cause contact dermatitis. Citral can also used as a masking ingredient.
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.
The term 'citral' is a collective term for two geometric isomers: geranial/Citral A and neral/Citral B.
Learn more about CitralIngredient Ratings
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When to use
Kiehl's Age Defender Power Serum 27 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
