Vitamin C + Collagen Hydrating Sheet Mask

By Nature

Vitamin C + Collagen Hydrating Sheet Mask

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About this product

The By Nature Vitamin C + Collagen Hydrating Sheet Mask is a sheet mask. Our analysis of its 26 ingredients (14 low-risk) rates it Excellent (87/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Sheet Mask
Ingredients
26
Low-risk
14
Fragrance
Contains fragrance
Origin
New Zealand
Data updated
May 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 3/7
Good for dry skin
Glycerin Hydrolyzed Collagen PEG-60 Almond Glycerides
Caution for dry skin
Xanthan Gum Glycerin Salicylic Acid Sodium Hydroxide Polysorbate 20 PEG-60 Almond Glycerides Triethanolamine
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Magnesium Ascorbyl Phosphate Salicylic Acid
Sensitive Skin 4/9
Good for sensitive skin
Magnesium Ascorbyl Phosphate Glycerin Tocopheryl Acetate Aloe Barbadensis Leaf Juice
Caution for sensitive skin
Glycerin Salicylic Acid Sorbic Acid Phenoxyethanol Benzyl Alcohol Triethanolamine Limonene Citral Amyl Cinnamal

Ingredients list

26 total
Lower hazard (1) Higher hazard (7)
All26 Skin Conditioning13 Fragrance9 Preservative5 Emulsion Stabilising4 Perfuming4 Masking4 Hair Conditioning4 Solvent4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
B
Aloe Barbadensis Leaf Juice
(Skin Conditioning)
Good for Sensitive Skin
Good for Sensitive Skin
Hamamelis Virginiana Water
(Astringent, Hair Conditioning, Skin Conditioning, Soothing)
Butyrospermum Parkii Butter
(Skin Conditioning, Viscosity Controlling)
1
A
Magnesium Ascorbyl Phosphate
(Antioxidant)
1
A
Hydrolyzed Collagen
(Hair Conditioning, Nail Conditioning Agent, Skin Conditioning, Antistatic Agent, Emollient, Film Forming, Humectant)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
A
Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling)
3
B
PEG-60 Almond Glycerides
(Skin Conditioning, Emollient, Emulsifying, Surfactant)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
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
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
5
B
Triethanolamine
(Fragrance, Ph Adjuster, Emulsifying, Surfactant, Buffering Agent, Masking)
4
B
Salicylic Acid
(Antiacne Agent, Antidandruff Agent, Corn/Callus/Wart Remover, Denaturant, Exfoliant, Fragrance, Hair Conditioning, Skin Conditioning, Keratolytic, Masking, Preservative)
Good for Oily Skin
Good for Oily Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
PARFUM
(Fragrance, Perfuming)
3
A
Sorbic Acid
(Fragrance, Preservative)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
2
A
Chlorphenesin
(Cosmetic Biocide, Antimicrobial, Preservative)
1
A
Dipotassium EDTA
(Chelating Agent)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
2
A
Tetrasodium EDTA
(Chelating Agent)
Amyl Cinnamal
(Perfuming)
Allergens
Allergens
7
Citral
(Flavoring Agent, Fragrance, Masking)
Allergens
Allergens
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens

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

Antioxidants
Shields skin from free radical damage.
Vitamin C
Brightens, evens tone, and supports collagen.
BHA
Unclogs pores and reduces excess oil.
Vitamin E
Protects skin and soothes irritation.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
BrighteningRestores radiance to dull, tired skin.
Scar HealingImproves the look of marks and scars.
Skin TextureSmooths rough patches and refines texture.
Anti-AgingSoftens lines and helps skin look youthful.
Reduces Large PoresMinimizes the look of enlarged pores.
Redness ReducingSoothes visible redness and calms irritation.
Barrier RepairStrengthen and restore your skin's natural barrier.

Concerns

Contains paraben
Contains eu allergen
Not fungal acne (malassezia) safe
Citral — higher EWG
May not suit dry skin
May not suit sensitive skin

EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Hamamelis Virginiana Water
Astringent, Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A AstringentHair conditioningSkin conditioningSoothing
Butyrospermum Parkii Butter
Skin conditioning, Viscosity controlling
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningViscosity controlling
Magnesium Ascorbyl Phosphate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
Hydrolyzed Collagen
Hair conditioning, Nail conditioning agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningNail conditioning agentSkin conditioningAntistatic agentEmollientFilm formingHumectant
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Carbomer
Emulsion stabilising, Viscosity increasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingViscosity increasing agentGel formingViscosity controlling
PEG-60 Almond Glycerides
Skin conditioning, Emollient
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Skin conditioningEmollientEmulsifyingSurfactant
Xanthan Gum
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingSkin conditioningSurfactant -emulsifying agentViscosity increasing agentBindingGel formingViscosity controlling
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Sorbic Acid
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservative
Chlorphenesin
Cosmetic biocide, Antimicrobial
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A Cosmetic biocideAntimicrobialPreservative
Dipotassium EDTA
Chelating agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Chelating agent
Sodium Hydroxide
Denaturant, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantPh adjusterBuffering agent
Tetrasodium EDTA
Chelating agent
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A Chelating agent
Aloe Barbadensis Leaf Juice
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A CIR B Skin conditioning Good for Sensitive Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
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
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens
Triethanolamine
Fragrance, Ph adjuster
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR B FragrancePh adjusterEmulsifyingSurfactantBuffering agentMasking
Salicylic Acid
Antiacne agent, Antidandruff agent
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B Antiacne agentAntidandruff agentCorn/callus/wart removerDenaturantExfoliantFragranceHair conditioningSkin conditioningKeratolyticMaskingPreservative Good for Oily SkinBad for Sensitive Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Amyl Cinnamal
Perfuming
Limited public safety data.Read moreShow less
EWG N/A Perfuming Allergens
Citral
Flavoring agent, Fragrance
Higher-hazard ingredient.Read moreShow less
EWG 7 Flavoring agentFragranceMasking Allergens
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens

How to use

How to use

  • 1 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 2 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

Pregnancy & breastfeeding

Contains ingredients some choose to avoid or double-check while pregnant or nursing.

Use with caution
BHA (salicylic) (Salicylic Acid)

Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.

This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.

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.

Magnesium Ascorbyl Phosphate, ASCORBIC ACID

BHA (salicylic) 0.5–2%

Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.

Salicylic 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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