Conditionneur Épaississant offert dès 50€ d'achat
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Clinical study of the Strengthening Protocol

CLINICAL STUDY

Strengthening Protocol

64x stronger & proven anti-breakage action

The Strengthening Protocol combines three complementary products to strengthen the hair fibre and protect hair from daily external aggressors:

  • Strengthening Shampoo – 200 ml
  • Strengthening Conditioner – 200 ml
  • Strengthening Serum – 100 ml

This routine acts on the hair's mechanical resistance, helps reduce breakage and improves protection of the hair fibre for visibly stronger, more supple and more resilient hair.

Like all Luxéol cosmetic products, the Strengthening Protocol is dermatologically tested to assess its skin tolerance, in addition to the efficacy tests presented on this page.

Scientifically assessed effectiveness

A double scientific study assessed the overall effectiveness of the protocol:

  • An ex vivo study on hair strands to measure the strength of the hair fibre.
  • An in vivo study on volunteers to assess the reduction in hair breakage.

ASSESSMENT PROTOCOLS

Assessment methods

VALIDATED BY USERS

A formula approved by testers

A usage test was conducted on 44 volunteers.

After 56 days of using the Strengthening Protocol, twice a week,
testers observed stronger, more resilient and less brittle hair.

Proven effectiveness

Silicone-free
and sulphate-free*

Cosmetic formulas
containing at least
89% ingredients
of natural origin

Made in France

USER PANEL RESULTS

Strengthening protocol

Stronger, protected hair
  • 97% notice fewer hairs on their hairbrush or in the bath / on the towel
  • 93% find that the protocol acts as a shield against external aggressors
  • 90% find their hair stronger and more resilient
  • 90% find their hair healthier
A strengthened and revitalised fibre
  • 90% find that the protocol reduces hair breakage
  • 90% find that their hair has regained strength and vitality
  • 84% find their hair hydrated
Sensoriality
  • 88% find the shampoo foam gentle
  • 86% find their hair soft, supple and lightweight
  • 97% find that the conditioner has a creamy, smooth and pleasant texture

Discover the range

100% MADE IN FRANCE¹

CLINICAL RESULTS

HAIR EXPERT

+150 PRODUCT TESTS¹

CSR COMMITMENT LABEL
(AFNOR)

SATISFIED OR
REFUNDED³

+20 BEAUTY AWARDS

**
Trustpilot

Luxéol is committed to a corporate social responsibility (CSR) approach assessed by an independent third party (AFNOR’s Engagé RSE certification). From formulation to manufacturing, we focus on our products’ ingredients, natural origin and performance.

Discover our commitments

For your health, eat at least five portions of fruit and vegetables a day - www.mangerbouger.fr

Food supplements should be used as part of a healthy lifestyle and should not be used as substitutes for a varied and balanced diet.  
Luxéol is a brand of food supplements and cosmetic products, primarily for hair and skin. Individual results may vary.  

Information may change; read product labels carefully before use.

¹: 150+ product tests: Total number of products tested by Luxéol (clinical studies, user trials and ex vivo tests) across all products developed as at 18/06/2026. 
100+ consumer tests as at 18/06/2026. Products counted individually, including when several products were evaluated in the same study.
Cosmetics and food supplements 100% made in France, except for the nail treatment and special volume treatment. Free from sulphate surfactants.

²: Total number of Luxéol consumer reviews recorded as at 08/04/2026: 83760, from all sources (luxeol.com and third-party platforms).

³: Excludes subscriptions. See the terms and conditions of sale

⁴: AUTUMN: Autumn promotion. One free leave-in conditioner with purchases of €50 or more, after discounts. Offer valid until 26 November 2026 (while stocks last).

**: Average rating based on our customer reviews on luxeol.com and Google as at 13/05/2026.

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