REN Clean Skincare Glow Daily Vitamin C Gel Cream Versus Dr. Dennis Gross Skincare Vitamin C Lactic Dewy Deep Cream
This brightening moisturizer is formulated around Ascorbyl Glucoside and Hippophae Rhamnoides Oil to brighten dull-looking skin and fade the look of dark spots.
This brightening moisturizer is formulated around 3-O-Ethyl Ascorbic Acid and Niacinamide to brighten dull-looking skin and refine skin texture.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Cetearyl Ethylhexanoate
Emollient
Lauryl Laurate
Skin Conditioning
Cetearyl Alcohol
Emollient
Tapioca Starch
Ascorbyl Glucoside
Antioxidant
Hydroxyacetophenone
Antioxidant
Carbomer
Emulsion StabilisingPhenoxyethanol
Preservative
Cetearyl Glucoside
Emulsifying
Mannitol
Humectant
Faex Extract
Skin ConditioningCitrus Grandis Peel Oil
Masking
Hippophae Rhamnoides Oil
Emollient
Parfum
Masking
Citrus Aurantium Dulcis Flower Oil
Astringent
Tocopherol
Antioxidant
Citrus Nobilis Peel Oil
Masking
Citrus Tangerina Peel Oil
Masking
Diglucosyl Gallic Acid
Glycogen
HumectantMagnesium Ascorbyl Phosphate
Antioxidant
Ammonium Bicarbonate
BufferingGlucose
Humectant
Helianthus Annuus Seed Oil
Emollient
Rosmarinus Officinalis Leaf Extract
AntimicrobialSodium Hydroxide
BufferingCitral
Perfuming
Limonene
Perfuming
Linalool
Perfuming
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
3-O-Ethyl Ascorbic Acid
Skin Conditioning
Niacinamide
Smoothing
Squalane
Emollient
Water
Skin ConditioningGlycerin
Humectant
Butylene Glycol
Humectant
Camellia Japonica Seed Oil
Emollient
Oryza Sativa Bran Oil
Emollient
Dimethicone
Emollient
Sucrose
Humectant
Pentylene Glycol
Skin Conditioning
Helianthus Annuus Seed Oil
Emollient
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion StabilisingLactic Acid
Buffering
Dipotassium Glycyrrhizate
Humectant
Ceramide NP
Skin Conditioning
Saccharide Isomerate
Humectant
Superoxide Dismutase
Antioxidant
Ubiquinone
Antioxidant
Undaria Pinnatifida Extract
Skin ConditioningAloe Barbadensis Leaf Juice
Skin Conditioning
Adenosine
Skin Conditioning
Collagen Amino Acids
Moisturising
Hydroxyproline
Skin ConditioningAcetyl Hexapeptide-8
Humectant
Leuconostoc/Radish Root Ferment Filtrate
Antimicrobial
Glycolic Acid
Buffering
Carnitine
Cleansing
Glycine
Buffering
Carnitine Hcl
HumectantLactobacillus Ferment
Skin Conditioning
1,2-Hexanediol
Skin Conditioning
Caprylyl Glycol
Emollient
Caprylic/Capric Triglyceride
Masking
Hydrogenated Lecithin
Emulsifying
Lecithin
Emollient
Maltodextrin
Absorbent
Hydroxyethylcellulose
Emulsion StabilisingPolysorbate 60
Emulsifying
Carbomer
Emulsion StabilisingAmmonium Hydroxide
BufferingPotassium Hydroxide
BufferingSodium Phytate
ChelatingCamellia Sinensis Leaf Extract
Antimicrobial
Cucumis Sativus Fruit Extract
Emollient
Triethyl Citrate
Masking
Lavandula Angustifolia Flower/Leaf/Stem Extract
Masking
Elettaria Cardamomum Seed Extract
Perfuming
Pyrus Malus Fruit Extract
Skin Conditioning
Rubus Idaeus Fruit Extract
AstringentCananga Odorata Flower Extract
Perfuming
Citrus Aurantium Bergamia Fruit Extract
Skin ConditioningCitrus Aurantium Amara Flower Extract
RefreshingCoffea Arabica Seed Extract
Masking
Cucumis Melo Fruit Extract
Skin ConditioningCupressus Sempervirens Leaf/Stem Extract
Skin ConditioningFucus Vesiculosus Extract
Emollient
Jasminum Officinale Flower Extract
Masking
Rose Extract
Skin ConditioningRosmarinus Officinalis Leaf Extract
AntimicrobialSalvia Officinalis Leaf Extract
CleansingSantalum Album Wood Extract
Perfuming
Phenoxyethanol
Preservative
Potassium Sorbate
Preservative
3-O-Ethyl Ascorbic Acid, Niacinamide, Squalane, Water, Glycerin, Butylene Glycol, Camellia Japonica Seed Oil, Oryza Sativa Bran Oil, Dimethicone, Sucrose, Pentylene Glycol, Helianthus Annuus Seed Oil, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Lactic Acid, Dipotassium Glycyrrhizate, Ceramide NP, Saccharide Isomerate, Superoxide Dismutase, Ubiquinone, Undaria Pinnatifida Extract, Aloe Barbadensis Leaf Juice, Adenosine, Collagen Amino Acids, Hydroxyproline, Acetyl Hexapeptide-8, Leuconostoc/Radish Root Ferment Filtrate, Glycolic Acid, Carnitine, Glycine, Carnitine Hcl, Lactobacillus Ferment, 1,2-Hexanediol, Caprylyl Glycol, Caprylic/Capric Triglyceride, Hydrogenated Lecithin, Lecithin, Maltodextrin, Hydroxyethylcellulose, Polysorbate 60, Carbomer, Ammonium Hydroxide, Potassium Hydroxide, Sodium Phytate, Camellia Sinensis Leaf Extract, Cucumis Sativus Fruit Extract, Triethyl Citrate, Lavandula Angustifolia Flower/Leaf/Stem Extract, Elettaria Cardamomum Seed Extract, Pyrus Malus Fruit Extract, Rubus Idaeus Fruit Extract, Cananga Odorata Flower Extract, Citrus Aurantium Bergamia Fruit Extract, Citrus Aurantium Amara Flower Extract, Coffea Arabica Seed Extract, Cucumis Melo Fruit Extract, Cupressus Sempervirens Leaf/Stem Extract, Fucus Vesiculosus Extract, Jasminum Officinale Flower Extract, Rose Extract, Rosmarinus Officinalis Leaf Extract, Salvia Officinalis Leaf Extract, Santalum Album Wood Extract, Phenoxyethanol, Potassium Sorbate
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture.
Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%.
It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier.
Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%.
A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions.
Learn more about CarbomerGlycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinHelianthus Annuus Seed Oil is a plant oil derived from the seeds of a sunflower.
It is rich in fatty acids, primarily linoleic acid and oleic acid. This gives it emollient and skin conditioning properties.
The reason this ingredient is so effective is because it forms a thin film on the skin that reduces transepidermal water loss (TEWL) while supplying linoleic acid to the stratum corneum to improve barrier strength.
The high linoleic acid content is particularly noteworthy for acne-prone skin.
Research suggests that acne-prone skin tends to be deficient in linoleic acid in sebum. Topical application may help replenish this to support a healthier follicular environment and less comedone-promoting sebum.
One randomized study found sunflower seed oil preserved skin barrier integrity in adult volunteers with and without atopic dermatitis (outperforming olive oil).
This ingredient is well-studied, gentle, and an effective emollient suitable for most skin types.
On fungal acne: This ingredient may not be Fungal acne (Malassezia folliculitis) safe. This is because it contains fatty acids with carbon chain lengths in the C11-C24 range.
Learn more about Helianthus Annuus Seed OilPhenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.
On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.
Another perk of this ingredient is that it stays functional across a wide pH range (3-10).
You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.
Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.
Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.
Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.
Learn more about PhenoxyethanolThis is a botanical extract from the rosemary plant (the same one you cook with). In skincare, it mostly works as a skin conditioning agent.
Its activity comes from a handful of polyphenols, carnosic acid, carnosol, and rosmarinic acid. Almost 90% of the antioxidant activity of this ingredient can be attributed to canosol and carnosic acid.
These compounds protect your skin two ways:
1) They fight off free radicals, or the unstable molecules from things like sun and pollution that age and damage skin.
2) They help calm inflammation by switching off the chemical signals that tell skin to get red and irritated.
Lab studies also suggest that rosmarinic acid may help protect collagen and slow sugar-related damage to it.
The Cosmetic Ingredient Review has concluded rosemary-derived ingredients to be safe when formulated to be non-sensitizing.
Rosemary can occasionally cause allergic contact dermatitis (due to carnosol), so be sure to patch test if you have reactive or fragrance-sensitive skin.
Learn more about Rosmarinus Officinalis Leaf ExtractWater. 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.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Learn more about Water
