Nail Strengthening Serum
- Regular price
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15 € - Regular price
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- Sale price
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15 €
Nail Strengthening Serum
- Regular price
-
15 € - Regular price
-
- Sale price
-
15 €
- Play video
The miracle strengthening treatment that instantly strengthens and regenerates soft, damaged nails.
Highly concentrated in plant keratin, silicon and biotin, this biomimetic formula boosts keratin production and densifies the nail plate.
Its fluid texture is immediately absorbed by the nail for deep action.
What is the nature of your nails? Take our diagnosis by clicking here to find out!
Applicator:Brush tip
Nail types:Damaged and Soft
Benefits:Strengthens & regenerates
Use:As a 2-week treatment
Free delivery from €39
Pay in 3 interest-free instalments (orders over €80)
Description
Concentrated care formula at 10%
- 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 aggressors
Proven visible results
- 85% find their nails harder*
- 81% find their nails stronger*
- 81% find their nails less split*
Easy and quick application
Its fluid alcohol-based texture opens the nail scales for deep penetration into the keratin layers of the nail. Its immediate absorption leaves the nail with no greasy or sticky finish.
Made with 96.5% naturally derived ingredients**
*Clinical test under dermatological control on 25 people after 2 weeks of application.
**Calculation based on the international standard ISO 16128.
How to use the Keratin Booster?
Your repair treatment for soft, damaged nails:
- Apply 1 to 3 times a day to bare nails using the brush.
- Let dry until the formula has fully absorbed. No need to rinse or massage: the active ingredients are naturally absorbed by the nail.
- Repeat daily for 5 to 7 days.
If you wish to apply nail polish after this treatment, degrease the nail surface for optimal wear.
(From age 12)
Pro tip ✨
For very soft or damaged nails, apply as an intensive treatment: 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% ingredients of natural origin*
*Calculation based on the international ISO 16128 standard.


















Miracle hardening treatment that strengthens and regenerates
Boosts
the production of keratin
Redensifies the plate
of the nailFluid texture
immediately absorbed
How to use the Keratin Booster?
Ideal for soft and damaged nails
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Apply 3 times a day to bare nails
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Leave to dry until fully absorbed
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Repeat the process for 1 week
FAQ
The most frequently asked questions from our users and community!
How long should I let the product dry?
The fluid texture is immediately absorbed by the nail. Simply let it dry naturally for a few seconds, no rinsing required.
Can you do a Keratin Booster treatment several times a year?
Yes, you can repeat the treatment several times a year. We recommend taking a break between each treatment and monitoring how your nails progress.
Can Keratin Booster be used with a treatment base coat?
Keratin Booster is used on its own, on bare nails. If you want to follow with a treatment base coat, apply it only after the treatment course and after cleansing the nail.
Can I use the Kératine Booster under a Green™ or Green Flash™ polish?
Yes, but it is essential to degrease the nail surface after the treatment has been absorbed to ensure good polish hold.
Our customers talk about us!
Reviews are collected 28 days after purchase and are from verified buyers only.
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Free delivery Free delivery to a pick-up point from €39 and to your door from €49. Valid in Metropolitan France.
Free delivery
Free delivery to a pick-up point from €39 and to your door from €49. Valid in Metropolitan France.
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3 interest-free instalments
Or pay by credit card, Paypal, Amazon Pay, Apple Pay, Bancontact, iDEAL, SOFORT, Giropay.
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Loyalty programme By becoming a Green Addict member, earn points and enjoy many exclusive perks!
Loyalty programme
By becoming a Green Addict member, earn points and enjoy many exclusive perks!
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Click & Collect Your order ready within 2 working hours in Paris, Tuesday to Saturday, 12pm–7pm.
Click & Collect
Your order ready within 2 working hours in Paris, Tuesday to Saturday, 12pm–7pm.
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✨ Book a free 15-min virtual consultation with one of our manicure experts!✨
✨ Book a free 15-min virtual consultation with one of our manicure experts!✨
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