Kiehl's Powerful Strength Line Reducing Concentrate

Kiehl's

Kiehl's Powerful Strength Line Reducing Concentrate

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About this product

The Kiehl's Powerful Strength Line Reducing Concentrate is a serums, essence, ampoule. Our analysis of its 9 ingredients (9 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
9
Low-risk
9
Fragrance
Fragrance-free
Origin
United States

The evidence

Quick Product Notes

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

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 3/4
Good for dry skin
Glycerin Propylene Glycol Cyclopentasiloxane
Caution for dry skin
Dimethicone Crosspolymer Glycerin Acrylates Copolymer Cetyl PEG/PPG-10/1 Dimethicone
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Ascorbic Acid (Vitamin C)
Sensitive Skin 2/3
Good for sensitive skin
Glycerin Ascorbic Acid (Vitamin C)
Caution for sensitive skin
Glycerin Propylene Glycol Ascorbic Acid (Vitamin C)

Ingredients list

9 total
Lower hazard (1) Higher hazard (3)
All9 Skin Conditioning10 Humectant4 Fragrance3 Solvent3 Viscosity Controlling3 Hair Conditioning3 Hair Fixing3 Viscosity Decreasing Agent2
EWG CIR Ingredient Name & Cosmetic Functions Notes
3
B
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
3
A
Cyclopentasiloxane
(Hair Conditioning, Skin Conditioning, Emollient, Solvent)
Silicone
Silicone
1
A
Ascorbic Acid (Vitamin C)
(Antioxidant, Fragrance, Ph Adjuster, Skin Conditioning, Buffering Agent, Masking)
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
3
A
Cetyl PEG/PPG-10/1 Dimethicone
(Emulsifying, Skin Conditioning, Surfactant)
1
A
Dimethicone Crosspolymer
(Emulsion Stabilising, Hair Fixing, Suspending Agent Nonsurfactant, Viscosity Increasingagent Nonaqueous, Viscosity Controlling)
1
B
Lauroyl Lysine
(Hair Conditioning, Skin Conditioning, Viscosity Controlling)
2
B
Acrylates Copolymer
(Adhesive, Artificial Nail Builder, Binding Agent, Film Forming, Hair Fixing, Suspending Agent Nonsurfactant, Antistatic Agent, Binding)
1
Adenosine
(Skin Conditioning)

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

Propylene Glycol
Humectant, Skin Conditioning
Cyclopentasiloxane
Skin Conditioning, Emollient
Ascorbic Acid (Vitamin C)
Antioxidant, Skin Conditioning
Glycerin
Humectant, Skin Protecting
Cetyl PEG/PPG-10/1 Dimethicone
Skin Conditioning
Lauroyl Lysine
Skin Conditioning

Benefits

Good for oily/acne-prone skin

Concerns

Contains silicone
Not fungal acne (malassezia) safe
May not suit dry skin
May not suit sensitive skin

Ingredients explained

Cetyl PEG/PPG-10/1 Dimethicone
Emulsifying, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A EmulsifyingSkin conditioningSurfactant
Dimethicone Crosspolymer
Emulsion stabilising, Hair fixing
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingHair fixingSuspending agent - nonsurfactantViscosity increasingagent - nonaqueousViscosity controlling
Lauroyl Lysine
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningSkin conditioningViscosity controlling
Acrylates Copolymer
Adhesive, Artificial nail builder
Low-hazard ingredient.Read moreShow less
EWG 2 CIR B AdhesiveArtificial nail builderBinding agentFilm formingHair fixingSuspending agent -nonsurfactantAntistatic agentBinding
Adenosine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Propylene Glycol
Fragrance, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceHumectantSkin-conditioningagent - miscellaneousSolventViscosity decreasing agentSkin conditioningViscosity controlling Good for Dry Skin
Cyclopentasiloxane
Hair conditioning, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Hair conditioningSkin conditioningEmollientSolvent Silicone
Ascorbic Acid (Vitamin C)
Antioxidant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AntioxidantFragrancePh adjusterSkin conditioningBuffering agentMasking 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

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Morning works well: Antioxidants like vitamin C pair well with daytime use under sunscreen.

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.

Ascorbic Acid (Vitamin C)

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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