Pore Tightening Ampoule Serum

One-Day's You

Where to buy Possibly in stock

About this product

The One-Day's You Pore Tightening Ampoule Serum is a serums, essence, ampoule. Our analysis of its 34 ingredients (20 low-risk) rates it Excellent (94/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
34
Low-risk
20
Fragrance
Fragrance-free
Origin
South Korea

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 8/2
Good for dry skin
Glycereth-26 Dipotassium Glycyrrhizate Caprylyl Glycol Butylene Glycol Sodium Hyaluronate Glycerin Trehalose Camellia Sinensis Leaf Extract
Caution for dry skin
Glycerin Camellia Sinensis Leaf Extract
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Camellia Sinensis Leaf Extract
Sensitive Skin 6/8
Good for sensitive skin
Malt Extract Paeonia Suffruticosa Root Extract Glycerin Polygonum Cuspidatum Root Extract Camellia Sinensis Leaf Extract Diospyros Kaki Leaf Extract
Caution for sensitive skin
Butylene Glycol Glycerin Cymbopogon Martini Oil Camellia Sinensis Leaf Extract Linalool Limonene Geraniol Pogostemon Cablin Leaf Oil

Ingredients list

34 total
Lower hazard (1) Higher hazard (7)
All34 Skin Conditioning25 Humectant9 Fragrance7 Solvent6 Masking6 Skin Protecting6 Tonic6 Hair Conditioning4
EWG CIR Ingredient Name & Cosmetic Functions Notes
Hamamelis Virginiana Water
(Astringent, Hair Conditioning, Skin Conditioning, Soothing)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
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
Glycereth-26
(Humectant, Viscosity Decreasing Agent, Solvent, Viscosity Controlling)
Cynanchum Atratum Extract
(Skin Conditioning)
1
Paeonia Suffruticosa Root Extract
(Skin Protecting)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
Diospyros Kaki Leaf Extract
(Skin Protecting, Tonic)
Vitis Vinifera Fruit Extract
(Skin Conditioning)
Coffea Arabica Seed Extract
(Fragrance, Skin Conditioning)
Carthamus Tinctorius Flower Extract
(Skin Conditioning)
1
Polygonum Cuspidatum Root Extract
(Antioxidant)
1
B
Camellia Sinensis Leaf Extract
(Antimicrobial, Antioxidant, Astringent, Emollient, Humectant, Masking, Oral Care Agent, Skin Conditioning, Skin Protecting, Tonic, Uv Absorber)
Good for Oily Skin
Good for Oily Skin
Castanea Sativa Shell Extract
(Skin Conditioning)
1
Zanthoxylum Piperitum Fruit Extract
(Skin Conditioning)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
Illicium Verum Fruit Extract
(Perfuming, Skin Conditioning)
1
A
Trehalose
(Flavoring Agent, Humectant, Moisturising)
1
Adenosine
(Skin Conditioning)
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
1
A
Dipotassium Glycyrrhizate
(Flavoring Agent, Skin Conditioning, Humectant)
1
Malt Extract
(Skin Conditioning, Skin Protecting, Tonic)
1
B
Octyldodeceth-16
(Emulsifying)
1
A
1,2-Hexanediol
(Solvent)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
Water
(Solvent)
citrus aurantium dulcis peel oil
(Fragrance, Skin Conditioning)
1
Cymbopogon Martini Oil
(Masking, Skin Conditioning, Tonic)
lavandula angustifolia oil
(Fragrance, Tonic)
Pogostemon Cablin Leaf Oil
(Masking)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
7
Geraniol
(Fragrance, Masking, Tonic)
Allergens
Allergens
5
Linalool
(Fragrance, Deodorant, Masking)
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

Hamamelis Virginiana Water
Astringent, Skin Conditioning
Butylene Glycol
Skin Conditioning, Humectant
Glycerin
Humectant, Skin Protecting
Glycereth-26
Humectant
Cynanchum Atratum Extract
Skin Conditioning
Paeonia Suffruticosa Root Extract
Skin Protecting

Benefits

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

Concerns

Contains eu allergen
Not fungal acne (malassezia) safe
Geraniol — higher EWG
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

Hamamelis Virginiana Water
Astringent, Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A AstringentHair conditioningSkin conditioningSoothing
Glycereth-26
Humectant, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantViscosity decreasing agentSolventViscosity controlling
Cynanchum Atratum Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Paeonia Suffruticosa Root Extract
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Diospyros Kaki Leaf Extract
Skin protecting, Tonic
Limited public safety data.Read moreShow less
EWG N/A Skin protectingTonic
Vitis Vinifera Fruit Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Coffea Arabica Seed Extract
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Carthamus Tinctorius Flower Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Polygonum Cuspidatum Root Extract
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 Antioxidant
Castanea Sativa Shell Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Zanthoxylum Piperitum Fruit Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Illicium Verum Fruit Extract
Perfuming, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A PerfumingSkin conditioning
Trehalose
Flavoring agent, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Flavoring agentHumectantMoisturising
Adenosine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
+ 12 more — see the full ingredients list above
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
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
Camellia Sinensis Leaf Extract
Antimicrobial, Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B AntimicrobialAntioxidantAstringentEmollientHumectantMaskingOral care agentSkin conditioningSkin protectingTonicUv absorber Good for Oily Skin
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
Geraniol
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMaskingTonic Allergens
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Morning only: Apply as the last step of your AM routine, after moisturiser, and reapply every ~2 hours of sun exposure.

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.

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

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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