Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum

Dr. Dennis Gross Skincare

Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum

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About this product

The Dr. Dennis Gross Skincare C+ Collagen Brighten & Firm Vitamin C Serum is a serums, essence, ampoule. Our analysis of its 39 ingredients (32 low-risk) rates it Excellent (95/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
39
Low-risk
32
Fragrance
Fragrance-free
Origin
United States
Status
Discontinued
Data updated
Jun 2026

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 8/7
Good for dry skin
Pueraria Lobata Root Extract Glycereth-7 Triacetate Butylene Glycol Glycerin Collagen Amino Acids Lactic Acid Carnitine HCl Hydrolyzed Soy Protein
Caution for dry skin
Denatonium Benzoate Xanthan Gum Glycerin t-Butyl Alcohol Sodium Hydroxide Polysorbate 20 Polysorbate 80
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Ascorbic Acid (Vitamin C)
Sensitive Skin 6/14
Good for sensitive skin
Superoxide Dismutase Ubiquinone Glycerin Quercetin Tetrahexyldecyl Ascorbate Ascorbic Acid (Vitamin C)
Caution for sensitive skin
Glycine Denatonium Benzoate Sodium Citrate Caramel Butylene Glycol Glycerin t-Butyl Alcohol Ascorbic Acid (Vitamin C) Citric Acid Sodium Benzoate Potassium Sorbate Lactic Acid Phenoxyethanol Benzyl Alcohol

Ingredients list

39 total
Lower hazard (1) Higher hazard (5)
All39 Skin Conditioning24 Fragrance13 Masking8 Humectant7 Solvent7 Buffering Agent6 Viscosity Controlling5 Ph Adjuster5
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
2-O-Ethyl Ascorbic Acid
(Skin Conditioning)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
1
Glycereth-7 Triacetate
(Emollient)
4
B
Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent)
Bad for Sensitive Skin
Bad for Sensitive Skin
4
A
SD Alcohol 40-B
(Astringent, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
1
Dimethyl Isosorbide
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
A
Ascorbic Acid (Vitamin C)
(Antioxidant, Fragrance, Ph Adjuster, Skin Conditioning, Buffering Agent, Masking)
Good for Dry Skin
Good for Dry Skin
1
Collagen Amino Acids
(Hair Conditioning, Skin Conditioning, Moisturising)
1
Superoxide Dismutase
(Reducing, Skin Conditioning, Antioxidant)
1
A
Glycine
(Buffering Agent, Fragrance, Hair Conditioning, Skin Conditioning Agent Miscellaneous, Antistatic Agent, Skin Conditioning)
B
Carnitine HCl
(Humectant, Skin Conditioning)
1
Ubiquinone
(Antioxidant, Skin Conditioning)
1
Hexylresorcinol
(Antimicrobial Agent, Cosmetic Biocide)
1
Emblica Officinalis Fruit Extract
(Skin Conditioning)
A
Hydrolyzed Soy Protein
(Antistatic Agent, Hair Conditioning, Humectant, Skin Conditioning)
1
Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning)
1
Quercetin
(Antioxidant, Skin Conditioning)
1
Mandelic Acid
(Antimicrobial)
1
Pueraria Lobata Root Extract
(Humectant)
1
Curcuma Longa (Turmeric) Root Extract
1
Phytic Acid
(Chelating Agent, Oral Care Agent)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
2
A
Tetrasodium EDTA
(Chelating Agent)
1
A
Sodium Citrate
(Ph Adjuster, Buffering Agent, Chelating, Masking)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
2
A
t-Butyl Alcohol
(Denaturant, Fragrance, Solvent, Perfuming)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
3
B
Polysorbate 80
(Denaturant, Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Denatonium Benzoate
(Denaturant, Fragrance, Masking)
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
3
A
Potassium Sorbate
(Fragrance, Preservative)
1
Caramel
(Colorant, Fragrance, Cosmetic Colorant, Masking)

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Glycerin
Humectant, Skin Protecting
2-O-Ethyl Ascorbic Acid
Skin Conditioning
Niacinamide
Skin Conditioning
Glycereth-7 Triacetate
Emollient
Lactic Acid
Exfoliant, Humectant
SD Alcohol 40-B
Astringent

Benefits

Good for dry skin
Good for oily/acne-prone skin

Concerns

Contains paraben
Contains eu allergen
Not fungal acne (malassezia) safe
May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
2-O-Ethyl Ascorbic Acid
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Glycereth-7 Triacetate
Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 Emollient
Hydroxyethylcellulose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentBindingStabilisingViscosity controlling
Dimethyl Isosorbide
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Collagen Amino Acids
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioningMoisturising
Superoxide Dismutase
Reducing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 ReducingSkin conditioningAntioxidant
Glycine
Buffering agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Buffering agentFragranceHair conditioningSkin-conditioning agent -miscellaneousAntistatic agentSkin conditioning
Carnitine HCl
Humectant, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A CIR B HumectantSkin conditioning
Ubiquinone
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Hexylresorcinol
Antimicrobial agent, Cosmetic biocide
Low-hazard ingredient.Read moreShow less
EWG 1 Antimicrobial agentCosmetic biocide
Emblica Officinalis Fruit Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Hydrolyzed Soy Protein
Antistatic agent, Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A CIR A Antistatic agentHair conditioningHumectantSkin conditioning
Tetrahexyldecyl Ascorbate
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
+ 14 more — see the full ingredients list above
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Lactic Acid
Exfoliant, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantFragranceHumectantPh adjusterSkin-conditioning agent -humectantSkin conditioningBuffering agent Bad for Sensitive Skin
SD Alcohol 40-B
Astringent, Solvent
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 4 CIR A AstringentSolventViscosity controlling Bad for Dry SkinBad for Sensitive Skin
Ascorbic Acid (Vitamin C)
Antioxidant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AntioxidantFragrancePh adjusterSkin conditioningBuffering agentMasking Good for Dry Skin
Citric Acid
Chelating agent, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 2 CIR A Chelating agentFragrancePh adjusterBuffering agentMasking Bad for Sensitive Skin
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Polysorbate 80
Denaturant, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantEmulsifyingSurfactant Fungal-acne trigger
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 3 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Vitamin C (ascorbic) 5–20%

L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.

2-O-Ethyl Ascorbic Acid, Ascorbic Acid (Vitamin C), Tetrahexyldecyl Ascorbate

Niacinamide 2–5% (up to 10%)

Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.

Niacinamide

AHA (acid exfoliant) 5–10% (OTC)

OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.

Lactic Acid, Mandelic Acid

INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.

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