Nail treatment serum
Nail Strengthening Serum

£15
£15

  • Strengthens
    A clear glass bottle of Manucurist Nail Strengthening Serum with a white cap sits on a light beige background. Its light green label displays product details in French and English, highlighting its nail-strengthening properties.
  • A bottle of Manucurist Starter Routine - Damaged Nails rests on a pink surface. Text notes 85% saw harder nails and 81% fewer splits or damage, with a clinical test disclaimer shown below.
  • A bottle of Manucurist Nail Strengthening Serum is shown with callouts highlighting its advanced nail care ingredients: plant keratin, AHA gluconolactone, biotin silicon, and vitamin C—ideal for strengthening damaged nails.
  • Close-up of a dry, peeling cuticle and damaged nails labeled Before, and smooth, healthy-looking cuticles and nails after using Manucurist Nail Strengthening Serum labeled After.
  • A hand applies Manucurist Nail Strengthening Serum to fingernails with a brush. Text: Apply 1–3 times daily to bare nails for 7 days. A light pink background highlights gentle care for damaged nails.
  • Nail Strengthening Serum
    Nail Strengthening Serum
  • A manicured hand tips a bottle of Manucurist Nail Strengthening Serum on a glossy pink surface, set against a light pink background—ideal for enhancing nail care and restoring damaged nails.
  • Two glass bottles of Manucurist nail care products sit on a light beige background. The left is Nail Strengthening Serum, a powerful fortifier, and the right restores damaged nails. Both have white caps with minimalist green and pink labels.
  • Three nail care products from Manucurist are arranged side by side: Nail Strengthening Serum in a square bottle, Masque S.O.S. overnight mask for damaged nails, and Concenté Perfecteur in a tube.
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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!

Applicator: Brush
Nail type: Damaged, Soft, Yellowed, and Sensitive
Benefits: Strengthens and regenerates nails
Usage: As a 2-week treatment
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Free delivery on +£39 orders

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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% find their nails harder*
  • 81% find their nails stronger*
  • 81% find 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 96,5% natural origin ingredients.**

*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 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. No need to rinse or massage: the active ingredients are absorbed naturally by the nail.
  • Repeat daily, for 5 to 7 days.

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: apply 3 times a day, for 7 days.

Ingredients / INCI

Super ingredients

INCI list

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

96,5% natural origin ingredients*

*Calculation based on the international ISO 16128 standards.
A clear glass bottle of Manucurist Nail Strengthening Serum with a white cap sits on a light beige background. Its light green label displays product details in French and English, highlighting its nail-strengthening properties.
A bottle of Manucurist Starter Routine - Damaged Nails rests on a pink surface. Text notes 85% saw harder nails and 81% fewer splits or damage, with a clinical test disclaimer shown below.
A bottle of Manucurist Nail Strengthening Serum is shown with callouts highlighting its advanced nail care ingredients: plant keratin, AHA gluconolactone, biotin silicon, and vitamin C—ideal for strengthening damaged nails.
Close-up of a dry, peeling cuticle and damaged nails labeled Before, and smooth, healthy-looking cuticles and nails after using Manucurist Nail Strengthening Serum labeled After.
A hand applies Manucurist Nail Strengthening Serum to fingernails with a brush. Text: Apply 1–3 times daily to bare nails for 7 days. A light pink background highlights gentle care for damaged nails.
Nail Strengthening Serum
A manicured hand tips a bottle of Manucurist Nail Strengthening Serum on a glossy pink surface, set against a light pink background—ideal for enhancing nail care and restoring damaged nails.
Two glass bottles of Manucurist nail care products sit on a light beige background. The left is Nail Strengthening Serum, a powerful fortifier, and the right restores damaged nails. Both have white caps with minimalist green and pink labels.
Three nail care products from Manucurist are arranged side by side: Nail Strengthening Serum in a square bottle, Masque S.O.S. overnight mask for damaged nails, and Concenté Perfecteur in a tube.

Miracle treatment that
hardens and regenerates

Boosts keratin
production

Redensifies
the nail plate

Fluid texture that’s
instantly absorbed

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

  •

    Apply 3 times a day on bare nails

  •

    Allow to dry fully for complete absorption

  •

    Repeat the routine for 1 week

FAQs

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.

Our customers talk about us!

Our reviews are collected 28 days after any purchase and these are the reviews of verified buyers only

Overall rating: 4.6998286 / 5 from 583 reviews.

AI Generated Review Summary

The nail strengthening serum offers noticeable nail strength and resilience, with a pleasant scent and a smooth, glossy appearance. However, some users did not notice significant improvements.

Summary topics

  • Nail Improvement (4%): Customers appreciated the noticeable difference in nails after using the Keratin booster nail polish and nail strengthening serum.
  • Nail Strength (40%): Many customers pointed out that the Keratin Booster made their nails stronger and more resilient than before.
  • Product Scent (5%): Customers expressed appreciation for the pleasant scent of the product, which was mentioned frequently in the reviews.
  • Keratin Booster (6%): Customers raved about the Keratine Booster, describing it as a game changer.
  • Nail Appearance (4%): It was observed by customers that this product makes the nails look healthy and smooth, providing a smooth and glossy appearance.

Review topics: ["smell","feel","improvement","problem","texture","look","boost","result","absorbs","glow","appearance","nails","consistency","strength","sensation","treatment","bottle","fragrance","care","effect","difference","serum","works","grow","polish","use","application","strengthens","become","dries"].

Review highlights

  • "The treatment is highly appreciated for hardening and repairing soft or damaged nails in just a few days." — Tatiana Y.
  • "Very good care, my nails harden well without splitting like before." — françoise t.
  • "My nails look healthy and smooth." — Denise P.

Reviews

Bon produit, facile à appliquer,

"Bon produit, facile à appliquer, sèche vite et laisse une finition douce sur l'ongle (sans gras, sans briller) et légèrement protectrice tout en laissant respirer l'ongle. Odeur neutre et bonne quantité de produit, car il faut faire un long traitement pour redonner aux ongles une belle qualité."

— TALBI V. (5/5)

Me encanta el keratine booster,

"Me encanta el keratine booster, te recupera en 2 semanas las uñas después de una rutina de manicura semi permanente. Tengo 55 años, siempre me he hecho la semi permanente (30 Años sin descanso)y ahora me estoy cuidando mucho mis uñas y mis manos con esta firma. La encuentro estupenda en todos los productos que pruebo y cumplen perfectamente su cometido . Y ahora me ha dado por los colores que me duran una semana con la base SOS y el top coat. El quitaesmalte es una pasada también. Lo más importante es la recuperación de mis uñas y lo tengo conseguido ! Venden calidad !!!!"

— Maria C. (5/5)

Ce produit se pose avec

"Ce produit se pose avec simplicité et sèche très vite après une cure intensive mes ongles sont beaucoup plus fort je sens la différence et c'est le 1er produit qui me fait ça. Je recommande vivement."

— Béatrice C. (5/5)

A ce jour,je ne peux

"A ce jour,je ne peux vous répondre car je viens juste de commencer à l’utiliser. Mais,je vous répète que vous n'êtes pas assez explicite dans vos ventes. Ce n'est pas ka première fous que je vous fais cette remarque mais...Bon..."

— b_venezian@orange.fr ‎. (5/5)

Sicuramente la velocità di applicazione

"Sicuramente la velocità di applicazione e di asciugatura è fantastica. Ho iniziato ad applicarlo da poco quindi sui risultati non posso pronunciarmi per ora ma spero sia ottimo!"

— Maria F. (4/5)

Tengo las uñas más hidratadas,

"Tengo las uñas más hidratadas, ya no sé ven tan débiles. Me lo aplicó tres veces al día. También he notado que no se me abren las uñas . Me encanta 😊😊"

— María J. (5/5)

The best nail repair serum

"The best nail repair serum I have tried. It strengthens my nail and also repairs small cracks in nail tips with regular use. Top product!"

— Michaela U. (5/5)

Un prodotto davvero comodo e

"Un prodotto davvero comodo e facile da usare nonchè efficace. Dopo 7 giorni di trattamento le unghie sono visibilmente più lisce e sane. lo consiglio!"

— Alice G. (5/5)

Mijn nagels voelen sterker en

"Mijn nagels voelen sterker en zien er gezonder uit. Een fijne booster voor mijn natuurlijke nagels!"

— Jasmina P. (5/5)

My nails have never been

"My nails have never been this healthy & long since I started using these products"

— Diana P. (5/5)

Q&A