<  Nail Care
Nail care - 0.5 fl oz

Nail Strengthening Serum

$15
$15

  • A clear glass bottle of Manucurist Nail Strengthening Serum with a white cap and green label, highlighting its strengthening benefits for damaged nails, is displayed against a pale beige background.
  • A close-up of a clear Manucurist Ultimate Routine - Soft Nails serum bottle on a pink background, with text stating 85% had harder nails and 81% saw fewer splits after 2 weeks—an effective nail hardener for repair.
  • Manucurist Nail Strengthening Serum—a potent nail care treatment—contains plant keratin, AHA, gluconolactone, biotin, silicon, and vitamin C to nourish and protect damaged nails.
  • Close-up of a fingertip shows a &quot;before&quot; with dry, peeling cuticles and an &quot;after&quot; with smooth, healthy skin after using Manucurist Nail Strengthening Serum. Text labels Before and After appear beneath each side.
  • A bare-nailed hand is shown as Manucurist Nail Strengthening Serum is applied. Text: Apply 1 to 3 times daily to bare nails for 7 days for strong, healthy nails.
  • Nail Strengthening Serum
    Nail Strengthening Serum
  • A manicured hand balances a bottle of Manucurist Nail Strengthening Serum on a glossy pink surface with a soft pink background—ideal for reviving and caring for damaged nails.
  • Two nail care bottles from Manucurist on a light beige background: Nail Strengthening Serum and Masque S.O.S. with pink liquid—ideal for restoring and strengthening damaged nails.
  • Three manicure products for nail care on a light pink background: a square bottle of Manucurist Nail Strengthening Serum, a square bottle of Masque S.O.S. overnight nail mask, and a tube of Concentré perfecteur.
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The miracle nail care that instantly strengthens and helps regenerate soft or damaged-looking nails.

Highly concentrated in plant-based keratin, silicon and biotin, this biomimetic formula helps naturally densify the nail plate.

Its fluid texture is instantly absorbed by the nail for deep, targeted action.

What type of nails do you have? Complete our analysis by clicking here and find out!

  • Coverage:Applicator:Brush
  • Coverage:Nail type:Damaged and Soft
  • Coverage:Benefits:Strengthens and regenerates nails
  • Coverage:Usage:As a 2-week treatment

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4.6/5 – Trusted by 117,000+ customers globally

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Description

10% concentrated care formula

  • Plant-based Keratin: intensely nourishes fragile nails
  • AHA & Gluconolactone: gently exfoliate the nail plate
  • Silicon: helps strengthen the nail
  • Biotin (Vitamin B8): helps harden and fortify the nail
  • Vitamin C: protects the nail from external aggressions

Proven visible results

  • 85% found their nails harder*
  • 81% found their nails stronger*
  • 81% found their nails were less likely to split*

Easy and fast application
The alcohol-based fluid texture is instantly absorbed, leaving the nail with no greasy or sticky finish.

Composed of 97,5% ingredients from natural origins.**

*Clinical test conducted under dermatological supervision on 25 individuals after two weeks of use.
**Calculation based on the international ISO 16128 standards.
How-to-use the Nail Strengthening Serum?

Your intensive repair care serum for soft or damaged-looking nails:

  • Apply 1 to 3 times a day on bare nails using the brush.
  • Let it dry completely until full absorption.
  • Repeat daily, for 5 to 7 days. No need to rinse or massage: the active ingredients are absorbed naturally by the nail.

If you wish to apply polish after this care, degrease the nail surface for optimum hold.

(Suitable from age 12)

Pro tip ✨

For very soft or damaged-looking nails, use as an intensive care treatement: apply 3 times a day for 7 days.
Sustainable Packaging

Glass Bottle: Emptied, cleaned and dried bottles can either be reused or placed in a recycling bin separate from other materials to avoid contamination. If your local municipality does not accept glass for recycling, bottles can be brought to a collection center. No need to remove labeling.

Plastic Cap (Plastic-type #5 - Polypropylene): Clean and remove cap from brush attachment and place in recycling bin or bring to a local collection center.

Nail Brush (Plastic-type #4 - Low Density Polyethylene): Clean and remove cap from brush and place in recycling bin or bring to a local collection center.

Label: No need to remove label as glass recycling processes will remove any labelling

Box (Kraft Paper Box): Paper box can be unfolded and added to paper recycling bin or brought to a local collection center, Kraft paper box can also be added to any compost bin.

As always, verify your local municipality's recycling regulations and procedures and for more information please go to berecycled.org/search or search.earth911.com
Ingredients (INCI)

Super ingredients

INCI list

ALCOHOL DENAT, AQUA (WATER), GLYCOLIC ACID, POLYACRYLATE CROSSPOLYMER 6, PARFUM (FRAGRANCE), PHAEODACTYLUM TRICORNUTUM EXTRACT, GLUCONOLACTONE, DIMETHYL SULFONE, PRUNUS ARMENIACA KERNEL OIL, PENTYLENE GLYCOL, ISOPROPYL ALCOHOL, ACETYL CYSTEINE, LENS ESCULENTA (LENTIL) SEED EXTRACT, HYDROLYZED CICER SEED EXTRACT, CHENOPODIUM QUINOA SEED EXTRACT, MAGNESIUM ASCORBYL PHOSPHATE, BIOTIN,TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES

96,5% natural origin ingredients*

*Calculation based on the international ISO 16128 standards.

Award-winning innovation 🏆

A clear glass bottle of Manucurist Nail Strengthening Serum with a white cap and green label, highlighting its strengthening benefits for damaged nails, is displayed against a pale beige background.
A close-up of a clear Manucurist Ultimate Routine - Soft Nails serum bottle on a pink background, with text stating 85% had harder nails and 81% saw fewer splits after 2 weeks—an effective nail hardener for repair.
Manucurist Nail Strengthening Serum—a potent nail care treatment—contains plant keratin, AHA, gluconolactone, biotin, silicon, and vitamin C to nourish and protect damaged nails.
Close-up of a fingertip shows a &quot;before&quot; with dry, peeling cuticles and an &quot;after&quot; with smooth, healthy skin after using Manucurist Nail Strengthening Serum. Text labels Before and After appear beneath each side.
A bare-nailed hand is shown as Manucurist Nail Strengthening Serum is applied. Text: Apply 1 to 3 times daily to bare nails for 7 days for strong, healthy nails.
Nail Strengthening Serum
A manicured hand balances a bottle of Manucurist Nail Strengthening Serum on a glossy pink surface with a soft pink background—ideal for reviving and caring for damaged nails.
Two nail care bottles from Manucurist on a light beige background: Nail Strengthening Serum and Masque S.O.S. with pink liquid—ideal for restoring and strengthening damaged nails.
Three manicure products for nail care on a light pink background: a square bottle of Manucurist Nail Strengthening Serum, a square bottle of Masque S.O.S. overnight nail mask, and a tube of Concentré perfecteur.

Miracle treatment: hardens and regenerates

  • A simple black outline of a magic wand with a star at the tip, surrounded by small lines representing sparkles or magical effects, on a light gray background.

    Soft and damaged-looking
    nail care

  • Simple black line drawing of an open right hand facing upward with three lines above it, suggesting receiving, offering, or presenting something.

    Redensifies
    the nail plate

  • A simple black and white line drawing of a nail polish brush with a rectangular handle and a curved brush tip.

    Fluid texture that’s
    instantly absorbed

How to use Keratin Booster? Perfect for soft, damaged-looking nails

  • A close-up of a hand applying clear nail polish to a fingernail using a brush. The background is neutral, keeping the focus on the nail and the application process.

    Apply 3 times a day on bare nails

  • A close-up of a hand with natural, well-groomed fingernails, gently resting on a white fabric. The nails are neatly shaped and have a healthy, glossy appearance.

    Allow to dry fully for complete absorption

  • A close-up of a person applying clear nail polish to their fingernail with a small brush. The nails are clean, trimmed, and natural-looking.

    Repeat the routine for 1 week

FAQ

Our Frequently Asked Questions from our customers and community!

How long should I let the product dry?

The fluid texture is instantly absorbed by the nail. Simply let it air-dry for a few seconds, no rinsing needed.
Can I use the Keratin Booster several times a year?

Yes, you can repeat the care several times a year. It’s recommended to take a break between each care and monitor your nail’s condition over time.
Can I use the Keratin Booster with a base coat?

The Keratin Booster should be applied on bare nails only. If you wish to use a base coat, apply it after the care, once the nail has been cleansed.
Can I apply the Keratin Booster under Green™ or Green Flash™ polish?

Yes, but it’s essential to cleanse the nail surface after the product has been absorbed to ensure optimal polish adhesion.

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