Kératine Booster

Manucurist

Where to buy Possibly in stock

About this product

The Manucurist Kératine Booster is a misc. Our analysis of its 17 ingredients (12 low-risk) rates it Excellent (95/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Misc
Ingredients
17
Low-risk
12
Fragrance
Contains fragrance
Origin
France

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 2/1
Good for dry skin
Gluconolactone Phaeodactylum Tricornutum Extract
Caution for dry skin
Alcohol Denat.
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Magnesium Ascorbyl Phosphate Alcohol Denat.
Sensitive Skin 4/3
Good for sensitive skin
Magnesium Ascorbyl Phosphate Acetyl Cysteine Phaeodactylum Tricornutum Extract Hydrolyzed Cicer Seed Extract
Caution for sensitive skin
Gluconolactone Isopropyl Alcohol Alcohol Denat.

Ingredients list

17 total
Lower hazard (1) Higher hazard (4)
All17 Skin Conditioning7 Solvent6 Viscosity Controlling4 Fragrance4 Skin Protecting2 Antioxidant2 Viscosity Decreasing Agent2 Humectant2
EWG CIR Ingredient Name & Cosmetic Functions Notes
4
Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
Water
(Solvent)
4
B
Glycolic Acid
(Exfoliant, Ph Adjuster, Buffering Agent)
Good for Oily Skin
Good for Oily Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
Polyacrylate Crosspolymer-6
(Emulsion Stabilising, Viscosity Controlling)
PARFUM
(Fragrance, Perfuming)
1
Phaeodactylum Tricornutum Extract
(Humectant, Soothing)
1
Gluconolactone
(Fragrance, Humectant, Solvent)
1
Dimethyl Sulfone
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
prunus armeniaca kernel oil
(Fragrance, Skin Conditioning)
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
2
A
Isopropyl Alcohol
(Antifoaming Agent, Fragrance, Solvent, Viscosity Decreasing Agent, Perfuming, Viscosity Controlling)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
B
Acetyl Cysteine
(Antioxidant, Skin Conditioning)
Lens Esculenta Seed Extract
(Skin Protecting)
1
Hydrolyzed Cicer Seed Extract
(Skin Protecting)
1
Chenopodium Quinoa Seed Extract
(Skin Conditioning)
1
A
Magnesium Ascorbyl Phosphate
(Antioxidant)
1
A
Biotin
(Hair Conditioning, Skin Conditioning, Antiseborrhoeic)

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

Alcohol Denat.
Astringent
Glycolic Acid
Exfoliant
Phaeodactylum Tricornutum Extract
Humectant, Soothing
Gluconolactone
Humectant
prunus armeniaca kernel oil
Skin Conditioning
Pentylene Glycol
Skin Conditioning

Benefits

Fungal-acne (Malassezia) safe
Good for dry skin
Good for oily/acne-prone skin
Good for sensitive skin

Concerns

No major concerns flagged

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Polyacrylate Crosspolymer-6
Emulsion stabilising, Viscosity controlling
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilisingViscosity controlling
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Phaeodactylum Tricornutum Extract
Humectant, Soothing
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSoothing
Gluconolactone
Fragrance, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHumectantSolvent
Dimethyl Sulfone
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
prunus armeniaca kernel oil
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Pentylene Glycol
Skin conditioning, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningSolvent
Acetyl Cysteine
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B AntioxidantSkin conditioning
Lens Esculenta Seed Extract
Skin protecting
Limited public safety data.Read moreShow less
EWG N/A Skin protecting
Hydrolyzed Cicer Seed Extract
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
Chenopodium Quinoa Seed Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Magnesium Ascorbyl Phosphate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
Biotin
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningAntiseborrhoeic
Alcohol Denat.
Antifoaming agent, Antimicrobial
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 4 Antifoaming agentAntimicrobialAstringentMaskingSolventViscosity controlling Bad for Dry SkinBad for Sensitive Skin
Glycolic Acid
Exfoliant, Ph adjuster
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantPh adjusterBuffering agent Good for Oily SkinBad for Sensitive Skin
Isopropyl Alcohol
Antifoaming agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A Antifoaming agentFragranceSolventViscosity decreasing agentPerfumingViscosity controlling Bad for Sensitive Skin

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

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

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.

Glycolic 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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