Here's our complete breakdown comparing the ingredients, attributes, and more of REN Clean Skincare Glow Daily Vitamin C Gel Cream versus Kiehl's Powerful-Strength Vitamin C Serum .
Published on May 29, 2021
Overview
What they are
These products are both reef safe . They have a total of 4 ingredients in common
Cool Features
They both contain Vitamin C
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, 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 need an update? Let us know.
General Moisturizer
All-purpose moisturizers hydrate the top layer of skin cells.
Serum
Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.
Price
Ingredient Info
REN Clean Skincare Glow Daily Vitamin C Gel Cream 31 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Alcohol Free
This product is free of harsh alcohols 🎉
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
Alcohol Free
This product is free of harsh alcohols 🎉
Contains Silicon
Ingredients in this product that are types of silicon:
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are EU allergens:
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
At a glance
Click on any of the items below to learn more
REN Clean Skincare Glow Daily Vitamin C Gel Cream 31 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
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 3 ingredients 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:
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This product contains 4 ingredients that may have this attribute:
Concerns
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient 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:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
REN Clean Skincare Glow Daily Vitamin C Gel Cream 31 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Water • Glycerin • Cetearyl Ethylhexanoate • Lauryl Laurate • Cetearyl Alcohol • Tapioca Starch • Ascorbyl Glucoside • Hydroxyacetophenone • Carbomer • Phenoxyethanol • Cetearyl Glucoside • Mannitol • Faex Extract • Citrus Grandis Peel Oil • Hippophae Rhamnoides Oil • Parfum • Citrus Aurantium Dulcis Flower Oil • Tocopherol • Citrus Nobilis Peel Oil • Citrus Tangerina Peel Oil • Diglucosyl Gallic Acid • Glycogen • Magnesium Ascorbyl Phosphate • Ammonium Bicarbonate • Glucose • Helianthus Annuus Seed Oil • Rosmarinus Officinalis Leaf Extract • Sodium Hydroxide • Citral • Limonene • Linalool
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 Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
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 GlycerinREN Clean Skincare Glow Daily Vitamin C Gel Cream contains this as ingredient number 2.
Kiehl's Powerful-Strength Vitamin C Serum contains this as ingredient number 3.
Ascorbyl 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 GlucosideREN Clean Skincare Glow Daily Vitamin C Gel Cream contains this as ingredient number 7.
Kiehl's Powerful-Strength Vitamin C Serum contains this as ingredient number 8.
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.
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 CitralREN Clean Skincare Glow Daily Vitamin C Gel Cream contains this as ingredient number 29.
Kiehl's Powerful-Strength Vitamin C Serum contains this as ingredient number 20.
Limonene 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 LimoneneREN Clean Skincare Glow Daily Vitamin C Gel Cream contains this as ingredient number 30.
Kiehl's Powerful-Strength Vitamin C Serum contains this as ingredient number 16.
Here's what our community thinks of the ingredients in these two products.
REN Clean Skincare Glow Daily Vitamin C Gel Cream 31 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
REN Clean Skincare Glow Daily Vitamin C Gel Cream 31 ingredients
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Reviews
Here's what our community thinks
Kiehl's Powerful-Strength Vitamin C Serum 21 ingredients
Alternatives
Our Dupe Finder has found 5 potential alternatives that have similar ingredients to REN Clean Skincare Glow Daily Vitamin C Gel Cream.
See 5 alternativesOur Dupe Finder has found 7 potential alternatives that have similar ingredients to Kiehl's Powerful-Strength Vitamin C Serum.
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