Name: Keratin Duo – Soft, Brittle Nails
Brand: PODERM®
Price: 44.9 CHF
Availability: InStock
Rating: 4.4 (1196 reviews)

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Keratin Duo – Soft, Brittle Nails

Broken, Ridged Nails Serum (8ml) + Color Strong Hardener Nail Polish (8ml)

CHF 44.90

CHF 44.90 ~~CHF 49.85~~ -10%

Broken & Ridged Nail Serum: hardening effect, +23% increase in thickness (in 4 months)*
Color Strong Hardening Nail Polish: strengthens and regenerates fragile nails

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Keratin Duo – Soft, Brittle Nails is a complete protocol designed to restore, harden, and strengthen soft, brittle, and damaged nails. It combines two complementary treatments, both formulated around a key active ingredient essential for nail health: keratin – the nail’s primary structural component.

The Brittle & Ridged Nail Serum is specifically formulated to fortify, nourish, and protect damaged nails. Thanks to the inclusion of phyto-keratin, it helps increase nail thickness by +23% in 4 months*, while smoothing ridges for visibly stronger nails.

The Color Strong Hardening Nail Polish, enriched with keratin, silicon, and biotin, helps to strengthen and regenerate fragile nails. Its breathable formula allows the serum’s active ingredients to penetrate through, ensuring continuous synergistic action.

Together, these two treatments work in perfect harmony to deliver visibly stronger, healthier nails. It's the ideal routine for consistently reinforced nails, day after day.

*Clinical test conducted by an independent laboratory, [thickness / differentiation / cornification…] of the nail plate, 31 volunteers, [4/1] months.

Main ingredients

Phyto-keratin
Phyto-keratin offers a plant-based alternative to animal keratin — a natural component of the nail known for strengthening fragile nails.
Sweet orange
Sweet orange peel essential oil is known for its gentle exfoliating action, thanks to its natural fruit acid content.
Sweet almond
Sweet almond is recognized for its nourishing and revitalizing properties, promoting smooth nail regrowth.
Silicon
Silicon strengthens the nail structure and improves flexibility.
Biotin
Biotin is a vitamin that helps maintain strong nail structure and a healthy appearance.

Complete ingredient list

Broken, Ridged Nails Serum

Color Strong Hardener Nail Polish

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Keratin Duo – Soft, Brittle Nails

CHF 44.90

CHF 44.90 ~~CHF 49.85~~ -10%

Out of stock

USE ADVICE

STEP 1
APPLY THE BASE COAT
Apply 1 coat of Color Strong base coat.
STEP 2
APPLY THE VARNISH
Apply 1 to 2 coats of Color Strong nail varnish.
STEP 3
APPLY THE TOP COAT
Apply 1 coat of Color Strong top coat to prolong the life of the varnish.
STEP 4
CONTINUE CARE
Use PODERM® nail serums to continue caring for your nails.

Overall rating: 4.367057 / 5 from 1196 reviews.

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Review highlights

Reviews

Vernis poderm

"Bonjour, j'ais commencer mon traitement de booster et de mycose dzs ongles le 1/06/ 26 j'avais les ongles vraiment abîmé. Je ne sais pas si c'était mycose ou dédoublement. J'ais arrêter le vernis mycose , et je met 2× par jour Ď panthénol depuis 10 jours . Mais j'ais les bouts des ongles qui se casse constamment ils sont très fragile Pouvez vous me dire en mettant la base de poderm ça les durcies un peu . Merci pour votre attente . Je vous let les ongles avant et après"

— Fevrier (5/5)

Un peu de patience et de persévérance

"J en suis à mon deuxième flacon Je trouve que mes ongles sont moins mous certains n ont plus de stries mais le résultat n est pas aussi rapide que je l aurais espéré. Pourtant je sais que c est un super produit car je l ai constaté sur les ongles de ma cousine qui me l a recommandé Je continue…."

— CORINNE F. (4/5)

Des ongles enfin forts et bien hydratés

"J’ai acheté ce sérum pour mes ongles striés et très secs. Depuis que je l’applique 2x par jour, je vois une vraie différence. Mes ongles sont de plus en plus forts, bien hydratés et leur aspect s’est nettement amélioré. Ils sont de plus en plus lisses. Je suis vraiment satisfaite des résultats. C’est un produit très efficace que je recommande sans hésiter."

— Anne B. (5/5)

Sérum réparateur ongles striés

"Au début je n’ai pas trouvé d’effets positifs, mais, par contre au bout de 2 à 3 mois c’est effectivement très bien. Mes ongles redeviennent petit à petit moins striés et bien plus soignés. Je recommande ce produit. J’en suis à mon 3ème flacon et je continue en espaçant de temps en temps."

— LACOSTE J. (5/5)

Très efficace

"Ce sérum est juste parfait. Je n'arrivais pas à trouver un soin pour traiter mes ongles qui se dédoublaient et qui se cassaient. Ils étaient également tout striés. Au bout de quelques jours d'utilisation j'ai déjà vu les résultats. Je l'ai associé au complément alimentaire. Mes ongles sont de nouveau beaux et fortifiés."

— Muriel (5/5)

super produit

"conforme à la description , je vois deja les effets d'ongles plus forts , moins cassants aprés un mois d'utilisation régulière . pour un effet maximisé je change le vernis tous les 2 à 3 jours . je recommande ce produit !"

— Sandrine (5/5)

Trop fragile

"Fiole casse au niveau du pinceau des la première utilisation Packaging trop fragile vue son prix"

— Fatima A. (1/5)

Le top

"Cela fait 2 semaines maintenant que j'utilise ce sérum, matin et soir et je suis enchantée du résultat. J'étais catastrophée de l'état de mes ongles et je me suis laissé tenter de tester votre produit et je n'ai aucun regret."

— nathalie P. (5/5)

waouh très efficace et de très haute qualité !

"Je recommande vivement j'ai les ongles hyper cassant et vraiment des les premières applications j'ai rapidement sentie la différence 😍🙏"

— Mériem B. (5/5)

Unterstützt die Nagelgenesung

"Die Nägel sind gut gepflegt und gefestigt. Die Nägel spalten sich oft bei den Rillen. Aber mit diesem Lack passiert das viel seltener. Gut finde ich auch dass das Serum trotzdem durchringen kann."

— Heidrun A. (5/5)

Q&A

All about the product

Why and when to use the Duo Soft, Brittle Nails – Color Strong?

The Keratin Duo – Soft, Brittle Nails is designed to strengthen fragile, soft, or brittle nails. It is ideal when your nails are prone to splitting, breaking, or lack strength. You can use it as soon as you notice signs of fragility, or simply as part of a regular care routine to maintain the health of your nails. For best results, it is recommended to use it daily by applying the Color Strong nail polish followed by the Striated & Brittle Nails Serum every day.

How to strengthen nails?

To strengthen nails, it is important to adopt an appropriate care routine. The first step is to deeply hydrate and nourish the nails using fortifying products, such as a targeted serum and a strengthening nail polish. The Keratin Duo – Soft, Brittle Nails is an excellent solution to reinforce nails by acting on their structure, resistance, and shine. Enriched with plant-based phyto-keratin, our serum visibly strengthens nails: +23% in thickness in 4 months*, smoother ridges, and fortified nails.

It is also important to avoid external aggressions, protect your nails with gloves during household chores, and steer clear of harsh chemicals. A healthy diet rich in vitamins and minerals can also help improve nail strength.

Which oil strengthens nails?

To strengthen nails, the Duo Keratin – Soft, Brittle Nails contains a complex of oils and active ingredients that work in synergy for their nourishing and fortifying properties:

Phyto-keratin: A plant-based alternative to animal keratin, this natural nail component is known for strengthening fragile nails.
Sweet orange: The essential oil from sweet orange peel is known for its gentle exfoliating action due to its fruit acid content.
Sweet almond: Sweet almond oil is recognized for its nourishing and revitalizing properties, helping promote smooth, healthy nail regrowth.

How to repair nails damaged by semi-permanent nail polish?

The Soft & Brittle Nails Duo – Color Strong is the ideal solution to repair nails damaged by semi-permanent nail polish. The Striated & Brittle Nails Serum, enriched with phyto-keratin, sweet orange peel essential oil, and sweet almond oil, hardens, nourishes, and smooths nail ridges. The Color Strong Hardening Nail Polish provides both protection and care, helping to strengthen weakened nails. This way, you can continue to wear nail polish while taking care of your damaged nails, without compromising their health and appearance.