nail care kit
Day & Night Duo

£25
£30
£25

  • Repairs & Nourishes
    Two square glass bottles from Manucurist’s Day Night Duo, each with a white cap and pastel label, are displayed on a light beige background. One is a keratin booster for soft, damaged nails; the other is a nourishing nail mask.
  • Two bottles of Manucurist Day Night Duo nail care on a pale pink background. Text reads: “85% said their nails were harder. 80% noticed more hydration.” Test details appear in smaller print.
  • Close-up: a finger with soft, damaged nails and peeling cuticles labeled Before, and a healthy, smooth nail After using Manucurist Day Night Duo.
  • A close-up shows natural nails as a brush applies treatment. Text describes a 7-day routine for soft, damaged nails using Manucurist&
  • Two clear Manucurist Day Night Duo nail care bottles with white caps float against a soft pink gradient background. One is for keratin boosting and the other is a nourishing nail mask.
  • 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.
  • Two Manucurist Day Night Duo products are arranged side by side on a light beige background, each in different bottles and packaging.
1 5

The day & night routine for soft and damaged-looking nails, an express care to strengthen and regenerate. This routine includes:

  • The Keratin Booster, a 10% concentrated care to instantly help repair fragile nails
  • The S.O.S. Nail Mask, an overnight care to intensely hydrate nails

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

Nail type: Damaged
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Free delivery on +£39 orders

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Description

The day & night routine
7 days to visibly repair soft and damaged-looking nails, with the combined action of two expert care

Day care - The Keratin booster:
The miracle hardening care that instantly strengthens and regenerates soft and damaged-looking nails.

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*

Its fluid texture is instantly absorbed, leaving the nail with no greasy or sticky finish.

*Clinical test conducted under dermatological supervision on 25 individuals after two weeks of use.

Night care - The S.O.S. Nail Mask:
The overnight mask intensely hydrates very damaged-looking nails. Its unique formula, highly concentrated in emollient and fortifying agents, forms a protective film on the nail surface to boost cell repair.

Proven visible results:

  • 80% find their nails more hydrated**
  • 75% find their nails harder**
  • 75% find their nails stronger**

**Test conducted on a panel of 20 people over 14 days.

How to use it?

Your 7-day care, to repair soft and damaged-looking nails:

  • Day care: On bare nails, apply the Keratin booster 1 to 3 times a day using the brush. Let it dry until fully absorbed.
  • Night care: On bare nails, apply the S.O.S. Nail Mask 2 to 3 nights a week in a thick layer. Let it dry. The next morning, remove it by peeling it off or washing with soapy water.

Pro tip 💅🏻

To complete the routine, nourish the cuticles daily with the Nourishing Nail Pen.

Ingredients/INCI

Super ingredients

INCI list

Nail Strengthening Serum:
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*

S.O.S. Nail Mask:
AQUA (WATER), ALCOHOL DENAT., POLYVINYL ALCOHOL, PANTHENOL, PARFUM (FRAGRANCE), ALCOHOL, TRIS(TETRAMETHYLHYDROXYPIPERIDINOL) CITRATE, CI 14700 (RED 4)

80,5% natural origin ingredients*

*Calculation based on the international ISO 16128 standards.
Two square glass bottles from Manucurist’s Day Night Duo, each with a white cap and pastel label, are displayed on a light beige background. One is a keratin booster for soft, damaged nails; the other is a nourishing nail mask.
Two bottles of Manucurist Day Night Duo nail care on a pale pink background. Text reads: “85% said their nails were harder. 80% noticed more hydration.” Test details appear in smaller print.
Close-up: a finger with soft, damaged nails and peeling cuticles labeled Before, and a healthy, smooth nail After using Manucurist Day Night Duo.
A close-up shows natural nails as a brush applies treatment. Text describes a 7-day routine for soft, damaged nails using Manucurist&
Two clear Manucurist Day Night Duo nail care bottles with white caps float against a soft pink gradient background. One is for keratin boosting and the other is a nourishing nail mask.
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.
Two Manucurist Day Night Duo products are arranged side by side on a light beige background, each in different bottles and packaging.

Day & night routine for soft, damaged-looking nails

Strengthens
and regenerates

Repairs
fragile nails

Intensely hydrates
the nail plate

How to use the Day & Night Routine?
Ideal for soft, damaged-looking nails

  •

    Apply the Keratin Booster 3 times a day

  •

    Apply the S.O.S. Nail Mask in the evening, every 3 days

  •

    Peel off the mask the next morning

FAQs

Our Frequently Asked Questions from our customers and community!

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.

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 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.

If I want to apply more treatment base coat, should I remove the old coat first?

When using a treatment base coat, there's no need to remove the previous coat.

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: 4.647059 / 5 from 204 reviews.

AI Generated Review Summary

Day & Night Duo offers a comprehensive routine for soft and damaged nails, featuring a keratin booster for instant strength and an overnight mask for intense hydration, leading to healthier and stronger nails.

Summary topics

  • Keratin Booster Effectiveness (10%): Customers expressed satisfaction with the keratin booster, as it quickly makes nails stronger and solid.
  • Nail Health Improvement (44%): Many customers appreciated the Manucurist products for their ability to make their nails healthier and stronger.

Review topics: ["smell","feel","boost","problem","look","improvement","nails","mask","result","treatment","duo","effect","care","application","difference","routine","polish","works","combo","keratin","use","become","serum","win","drying","makes","film","grow","remover","splitting"].

Review highlights

  • "The Keratin Booster absorbs very quickly and leaves no film on the nails." — Christine S.
  • "I use them in addition to Glossy Booster and my nails look and feel so much stronger, healthier, and shinier." — Antoinette
  • "The Keratin booster is really simple to use, smells very nice and penetrates quickly." — annie c.

Reviews

Assez bluffant : le "kératine

"Assez bluffant : le "kératine booster" disparaît immédiatement, comme bu par les ongles. Et le masque est la toute dernière chose à faire, avant de se coucher. J'attends beaucoup de ces 2 produits ! Et il me semble bien que mes ongles ont meilleure apparence ✌️"

— Catherine H. (5/5)

Incredibile, mia figlia l'ottava con

"Incredibile, mia figlia l'ottava con le unghie deboli e che si sfaldavano da ormai due anni. In 3 settimane di trattamento ha risolto. Pensavo migliorasse, non risolvesse. . . Sono stupita. Ora lo fa ogni tanto, giusto per tenerle curate"

— Silvia C. (5/5)

Tenía las uñas muy deterioradas,

"Tenía las uñas muy deterioradas, se me abrían en capas y se me rompian. He conseguido que me crezcan sin q se rompan tanto. Se ven más sanas."

— Esperanza R. (5/5)

Really impressed with this duo

"Really impressed with this duo of treatments - using them daily & while it’s taking time my nails feel smoother & tougher although nails still slow to grow"

— Jill H. (4/5)

Fantastici entrambi! Sia la maschera

"Fantastici entrambi! Sia la maschera che il rafforzamento di keratina🙏❤️"

— Alessandra P. (5/5)

Excellente routine de soins. Le

"Excellente routine de soins. Le masque sos: résultat bluffant"

— Marie-Christine J. (5/5)

Bonjour, j’ai beaucoup aimé car

"Bonjour, j’ai beaucoup aimé car produits très efficaces. Je recommande vivement"

— davidclaire2103@gmail.com ‎. (5/5)

These were not sent. It

"These were not sent. It took 6 emails etc to get a reply. In the meantime I punched another product. I asked for a refund. I was promised the Green Oil free to make up for the problems. This of course did not arrive either. I have not as yet used the product so cannot comment on if it works."

— bishosborne@gmail.com ‎. (5/5)

C'est soins sont supers. Facile

"C'est soins sont supers. Facile a appliquer. Je les recommande les yeux fermés"

— Laure D. (5/5)

Mes ongles ont changés du

"Mes ongles ont changés du tout au tout !genial"

— Charlotte M. (5/5)

Q&A