The SELKEYS PARIS Expertise
Discover our unique scientific expertise: patented technologies SPCG®, CellRead® and CellAdapt®, the result of over 20 years of research in French cosmetology. A unique physiomimetic approach that reproduces and stimulates each skin's natural mechanisms without forcing them. Adaptive skincare that evolves with your skin, for perfect alignment with its needs and fundamental biological structure.
Years of expertise
Maximum naturality
Synergistic actions
French manufacturing
Skin deserves more than promises. It deserves a scientist.
20 years of expertise in safety, quality, regulatory affairs and development of health and cosmetic products.
Hundreds of solutions and formulas, developed and controlled, in service of others.
Then one conviction became clear: create skincare that truly respects skin.
100% French serums, fragrance-free, with very high tolerance, for all skin types, even the most fragile and reactive.
Actives selected for their purity, safety, and origin. Three exclusive technologies designed to support skin without forcing it. And behind every bottle, a woman.
Alexandra Liarsou, Ph.D — Founder
Six Pillars of Our Excellence
Recognized expertise that places SELKEYS PARIS at the forefront of French cosmetic innovation.
100% French Manufacturing
Design and manufacturing in France with full control from concept to production
- Paris laboratory
- Rigorous quality control
- Full traceability
Patented SPCG® Technology
Support for Generative Cellular Processes - a unique physiomimetic approach
- 6 synergistic actions
- Adaptation to skin signals
- Scientifically proven efficacy
High Naturality
Formulas up to 99% natural, plant actives without pollutants or controversial substances
- No phenoxyethanol
- No added allergens
- No synthetic actives
Scientific Expertise
Over 20 years of dermatology and cosmetology experience
- 20+ years expertise in health & cosmetic quality
- PhD in Life Sciences
- A demanding journey serving next-generation cosmetics
In Vivo Clinical Tests
Efficacy measured through instrumental analyses on volunteers
- Quantified results
- Demanding conditions
- Scientific protocols
Certified Quality
ECOCERT GREENLIFE approved actives, compliant with COSMOS and NATRUE
- International certifications
- High standards
- Quality commitment
Molecular Network SPCG®
Our Support for Generative Cellular Processes technology is based on 6 synergistic actions that support your skin's natural biological mechanisms without disrupting or overloading them. Our exclusive molecular network allows for more precise and deep release of active ingredients, to maximize their potential.
Water Capture
Process of capturing environmental moisture and transferring it to the skin
Scientific detail: This mechanism helps to deeply hydrate the lipid barrier and limit skin water loss, by inserting itself between lipid spaces.
Active Boost Catalysis
Process that amplifies active ingredient penetration
Scientific detail: By optimizing their absorption, the molecular network promotes the diffusion of water-soluble substances to skin layers where they can act effectively, supporting skin regeneration mechanisms.
Microbiome Preservation
Process that balances the skin microbiome
Scientific detail: It restores natural hydration mechanisms, essential for maintaining skin elasticity and firmness, while contributing to its microbial balance.
Intercellular Cohesion
Improves cohesion of skin cells, called corneocytes
Scientific detail: Skin relies on a "brick and mortar" organization: corneocytes form the bricks, and intercellular lipids ensure cohesion. This mechanism improves corneocyte plasticity and reinforces intercellular lipids.
Anti-OX
Antioxidant protection against free radicals
Scientific detail: This mechanism neutralizes molecules involved in premature skin aging, preserves skin radiance and supports its natural cellular repair processes.
Super Activity Boost
Temporary increase in stratum corneum permeability
Scientific detail: This mechanism promotes active ingredient passage through the epidermis by facilitating their diffusion between cells, to improve their bioavailability at the skin level.
A Technology that Speaks Your Skin's Language
Inspired by natural biological mechanisms, our technology supports essential cellular processes without disrupting them. Physiomimetic, our intelligent formulas adapt to your skin's actual state and modulate their action according to its needs, application after application.
ANALYZE YOUR SKINOur Manufacturing Expertise
From ingredient selection to stability testing, discover the key steps in creating our exceptional formulas.
Ingredient Selection
Meticulous selection work guided by texture, sensoriality, effectiveness and formula stability.
Each choice contributes to the overall formula balance
Stability is essential to ensure safety
Product performance over time
Actives chosen from the best worldwide
Precision Weighing
Weighing with precision scales, regularly calibrated.
Rigorous control of all water parameters, an essential quality criterion
Continuous monitoring of the water circuit in the facility
Mastery of integrating liquid, solid, and semi-solid ingredients
Incorporation of each form at the right moment, according to an adapted process
Heating and Mixing
Controlled temperature to facilitate ingredient dissolution.
Progressive addition of ingredients under agitation
Equipment and speeds adapted to each type of material
Precise incorporation order defined by specialist chemists
Procedure specific to each formula to ensure homogeneity and stability
Quality Controls
Rigorous controls throughout development, to ensure quality, stability and efficacy of the final product.
pH control (4.5 to 6.5) compatible with skin
Viscosity and texture control
Microbiological control (microbial load)
Organoleptic control (appearance, scent, texture)
Temperature control at sensitive stages
Dispersion and homogeneity test
Stability Tests
Heat, cold, and light stress tests
Stability observation over time
Tests in demanding conditions
Additional controls
Fine adjustments to ensure faithful, safe and consistent reproduction
Clinical Tests In Vivo
The effectiveness of our serums is measured through rigorous instrumental analyses on panels of volunteers.
A2 Anti-Aging Serum: Measured Efficacy
Measured Results:
Reduction in wrinkle length in 100% of volunteers (-11%)
Reduction in wrinkle depth in 67% of participants (-18%)
Reduction in wrinkle count in 100% of volunteers (-12%)
6% decrease in overall wrinkle volume
10% reduction in total wrinkled surface
Mode of Action:
Increases Ki-67 marker (keratinocyte proliferation)
Restructures the dermo-epidermal junction
Improves dermis-to-epidermis binding
Maintains elastic fibers
Mimics hygroscopic substances
E3 Dark Spot Serum: Measured Efficacy
Measured Results:
Measurable brightening effect in 100% of volunteers
Average 5% reduction in melanin content
Progressive and harmonizing action
Brighter, more even complexion
Without altering physiological balance
Mode of Action:
Inhibits melanosome transfer to keratinocytes
Brightening effect with daily use over 3 months
Tyrosinase inhibition (melanin synthesis)
Natural arbutin inhibits 95% of tyrosinase
Ready to Discover Your Ideal Serum?
Our 20 years of expertise at your skin's service. Start with our free diagnostic for personalized recommendations.