A hybrid that respects cutaneous physiology - NATINUEL ReSkin
A hybrid that respects cutaneous physiology.
Scientific formulation for the discerning aesthetician
THE MISUNDERSTOOD STRATUM CORNEUM
'The stratum corneum is not an accumulation of dead cells. It is a biologically active structure whose respect is the premise of any sensible dermatological intervention.' — A.M. Kligman
For decades, cosmetology has treated the stratum corneum as waste to be removed. An inert accumulation of dead cells, fit only to be torn away, dissolved, or abraded. Aggressive scrubs, anionic surfactants, acids without rationale: all justified by an idea that research has shown to be profoundly wrong.
Kligman, Elias, Menon and others have overturned this view. The stratum corneum is a structure organised with architectural precision: corneocytes are arranged in ordered layers, held together by corneodesmosomes — protein junctions actively synthesised and degraded by endogenous enzymes (kallikreins, cathepsins) in a process of controlled physiological desquamation.
But the truly living part is the intercellular lamellar lipid membrane: a system of ceramides, cholesterol and free fatty acids organised in ordered bilayers. A biological factory active round the clock, maintaining the impermeable barrier, regulating molecular transit, and governing water homeostasis.
The paradox of modern aesthetics
The majority of 'cleansing' and 'scrub' products on the market work AGAINST this architecture. Anionic surfactants extract ceramides from the intercellular membrane. Abrasive particles cut transversely through corneocytes and membrane, destroying the lamellar organisation. The result is not 'clean' skin: it is a damaged barrier that will need to be repaired — often with further products.
This cycle — aggress then repair — is one of the greatest errors of modern aesthetics and cosmetics. And it is precisely the problem that ReSkin has been designed to solve, giving the aesthetician a unique instrument for the treatment room.
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A PRODUCT THAT SHOULD NOT HAVE EXISTED — BUT WAS NEEDED
In the treatment room, the aesthetician knows it well: the standard sequence is cleanse, scrub, hydrate, soothe. Four steps, four products, four passes — each one necessary because the previous one has created a problem.
ReSkin cannot be classified within conventional categories. It is not a cleanser: it contains no anionic surfactants and does not strip the lipid film. It is not a classical scrub: it does not mechanically tear corneocytes from the surface. It is not a peel: it does not use acids to dissolve intercellular junctions.
ReSkin is a hybrid. A professional product that performs four simultaneous actions which traditional cosmetics considers sequential and often incompatible:
1. Cleanses physiologically — without disorganising the lipid lamellae
2. Smooths by buffing — without tearing cells from the stratum corneum
3. Actively hydrates — restoring NMF components during cleansing
4. Desensitises — modulating the cutaneous neurosensory response
Simultaneity is not a sum: it is an architecture. In a conventional treatment room, these actions are sequential because each creates a problem the next must solve. The cleanser strips → the moisturiser rehydrates. The scrub irritates → the soothing agent calms. ReSkin eliminates the causal chain: it does not create the damage it then has to repair.
It is not a product that does four things. It is a product that makes the other three unnecessary.
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PHYSIOLOGICAL CLEANSING
Poloxamer 184: the surfactant that does not aggress
ReSkin's cleansing system is based on Poloxamer 184, a polyethylene oxide – polypropylene oxide – polyethylene oxide (PEO-PPO-PEO) block copolymer. It is a non-ionic surfactant — and this distinction is not semantic, it is functional.
Anionic surfactants (SLS, SLES, soaps) carry a negative charge that interacts with the polar heads of ceramides in the lamellar lipid membrane. They intercalate into the lipid bilayers, disorganise them and extract them. Every wash with an anionic surfactant is a micro-injury to the barrier requiring 4–12 hours to repair.
Poloxamer 184 cleanses by micellar solubilisation: surface impurities (oxidised sebum, particulate matter, cosmetic residues) are engulfed within the copolymer's micelles and removed upon rinsing. The Poloxamer micelles do not penetrate the lipid lamellae because their geometry and HLB do not permit it.
The practical significance
After rinsing with an anionic cleanser, the client's skin is 'clean' but compromised: TEWL (Trans-Epidermal Water Loss) increases, pH is altered, and ceramides must be re-synthesised. After rinsing with ReSkin, the skin is clean and the barrier is intact. This is not a cosmetic claim: it is lamellar lipid membrane biochemistry.
The choice of pairing Poloxamer 184 with a non-ionic emulsifier such as Polyglyceryl-3 Methylglucose Distearate further reinforces this logic: both components of the cleansing system are uncharged and therefore incapable of disorganising the lamellar lipid architecture.
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SMOOTH, NOT TEAR
The concept of corneocyte buffing
A conventional scrub uses abrasive particles (plastic microspheres, crushed shells, salt or sugar crystals) to exert sufficient mechanical force to detach corneocytes from the surface. The action is one of shearing: the particle, driven by massage pressure, breaks the corneodesmosomes and removes the cell together with portions of the underlying intercellular lamellar lipid membrane.
ReSkin introduces a different concept: smoothing by buffing. The system comprises two types of particle with complementary hardness and geometry:
Walnut shell powder (Juglans regia) Natural particles of controlled granulometry, whose mechanical action is calibrated to smooth the surface irregularities of corneocytes — the raised edges of cells in the physiological detachment phase — without generating sufficient shearing force to break the underlying corneodesmosomes.
Cellulose microgranules Particles significantly softer than walnut shell, acting as a cushion during massage. Pressure is distributed over a wider surface area; the contact is gentler. The combined action is one of polishing, not stripping.
The physiological result is precise: the corneocyte remains in place, the corneodesmosomes are not mechanically broken, the intercellular lamellar lipid membrane is not torn. Yet the surface becomes more uniform to the touch and to light reflection — hence the 'soft touch' effect and immediately perceptible luminosity.
The difference between a classical scrub and ReSkin is the same as that between sanding a piece of furniture with coarse sandpaper and buffing it with a soft cloth. The former removes material. The latter smooths without removing anything.
Technical note — rice starch
Oryza Sativa Starch contributes to the smoothing action through a different mechanism: its spherical particles absorb surface sebum and improve massage glide, reducing friction and therefore the force transmitted to the corneocytes. It is a comfort agent that protects during the mechanical action.
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BIOMIMETIC EXFOLIATION
Bacillus Ferment: the enzyme that speaks the skin's language
This is the ingredient that transforms ReSkin from 'gentle scrub' into something conceptually new. Bacillus Ferment contains subtilisin-type serine proteases — enzymes with a precise target: the peptide bonds in corneodesmosomes.
It is the same type of molecular target that endogenous epidermal kallikreins (KLK5, KLK7, KLK14) degrade in the natural desquamation process. The difference from conventional chemical approaches is profound:
Acids (AHA/BHA) Operate at acidic pH (2.0–4.0). They dissolve corneodesmosomes through non-selective protein denaturation. Treatment intensity depends on concentration and pH — both far removed from cutaneous physiology.
Bacillus Ferment Operates at physiological pH (5.0–6.0). It cleaves corneodesmosomes through selective enzymatic hydrolysis, with substrate specificity. There is no need to force the pH of the skin surface: the enzyme works precisely within the skin's natural range.
Bacillus Ferment does not 'exfoliate' in the conventional sense — it does not remove cell layers. It facilitates the physiological detachment of cells the skin is already preparing to release, accelerating an endogenous process. It is biomimetic exfoliation: the product does not impose a rhythm on the skin; it follows one.
Why this changes everything
An acid at pH 2.5 cannot distinguish a mature corneodesmosome (ready for detachment) from an immature one (structurally necessary for the barrier). Bacillus Ferment can, because enzymatic specificity is guided by substrate conformation: mature corneodesmosomes, partially degraded by endogenous kallikreins, present accessible cleavage sites. Immature ones do not. The enzyme respects the hierarchy the skin has already established.
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HYDRATE WHILST CLEANSING
Urea and Betaine: the NMF-mimetic system
The Natural Moisturising Factor (NMF) is the endogenous hygroscopic system of the stratum corneum — a collection of molecules (free amino acids, pyrrolidone carboxylic acid, urea, lactate, inorganic ions) contained within corneocytes and responsible for maintaining cutaneous hydration.
A conventional cleanser removes NMF components with every wash. ReSkin restores two of the most important:
Urea A natural NMF component (approximately 7% of the total). At the concentrations present in this formula, it is hydrating and NMF-mimetic: it binds water via hydrogen bonds within corneocytes, maintaining the plasticity and turgidity of the stratum corneum. At these concentrations the effect is exclusively moisturising — not keratolytic.
Betaine (trimethylglycine) A natural osmolyte present in epidermal cells. Its primary function is osmotic protection: it stabilises cellular proteins under conditions of water stress and binds water with high efficiency. It acts synergistically with urea in restoring corneocyte water balance.
The concept is counter-intuitive but biochemically precise: whilst the product cleanses, it simultaneously restores NMF components. The 'hydration void' that a classical cleanser creates — and that requires a subsequent product to fill — is never generated.
It is the difference between rain that erodes the soil and rain that irrigates it. The same water, but an entirely different intention.
Contributing further is Glycerol (Glycerin), the benchmark humectant in cosmetics, positioned high in the INCI list, adding hygroscopic capacity to the aqueous phase. And Lactose, a disaccharide with humectant and soothing properties, which completes the formula's hydrating profile.
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DESENSITISE: THE FOURTH SILENT STEP
4-t-Butylcyclohexanol: TRPV1 sensory modulation
4-t-Butylcyclohexanol is a modulator of TRPV1 receptors (Transient Receptor Potential Vanilloid 1) — the thermal nociceptors that mediate the sensation of burning, stinging and warmth on the skin.
It is not a classical anti-inflammatory: it does not inhibit prostaglandins or leukotrienes. It acts upstream, on neurosensory perception: it reduces the activation threshold of TRPV1 receptors, rendering the skin less reactive to stimuli that would normally trigger the 'sting and burn' response.
Its inclusion in ReSkin serves a dual logic:
Protection during use Even the most delicate mechanical action may generate micro-activation of superficial nociceptors, particularly on sensitised or post-treatment skin. 4-t-Butylcyclohexanol prevents this activation.
Safety on reactive skin The aesthetician can use ReSkin even on clients with a low cutaneous sensitivity threshold — a growing segment, often excluded from the use of active scrubs or cleansers in the treatment room.
The fourth simultaneous action
Whilst the product cleanses (Poloxamer), smooths (particles), supports biomimetic desquamation (Bacillus Ferment) and hydrates (Urea + Betaine), it simultaneously protects the cutaneous nervous system from sensory stress. Not an accessory action: it is the condition that makes the simultaneity of the other three possible on any skin type, widening the range of clients treatable in the treatment room.
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THE OIL PHASE: RESTORE, NOT STRIP
Biomimetic emollients and antioxidants
ReSkin's oil phase is not a passive vehicle: it is an active lipid restoration system that operates during cleansing, not after.
Isododecane A volatile emollient that evaporates after rinsing, leaving the skin with a silky feel without greasy residue. It improves glide during massage, reducing mechanical friction on the stratum corneum.
Isopropyl Palmitate and Isopropyl Myristate Medium-polarity ester emollients that compatibilise the oil phase with the skin surface. IPM also has permeation-enhancing properties for water-soluble active components.
Sweet Almond Oil (Prunus amygdalus dulcis) Rich in oleic acid (60–80%), a natural triglyceride with high affinity for cutaneous lipids. A classic emollient with documented soothing activity.
Grape Seed Oil (Vitis vinifera) A source of linoleic acid (65–75%) — an essential fatty acid that is a direct precursor of endogenous ceramides. Additionally, it provides oligomeric proanthocyanidins (OPCs) with documented antioxidant activity.
The concept is symmetrical to that of cleansing: whilst the Poloxamer removes impurities without touching structural lipids, the oil phase restores compatible lipids to the lamellar lipid membrane. The net balance is not a subtraction, as with a classical cleanser, but an equilibrium.
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PURIFICATION AND REBALANCING
Kaolin and supporting actives
Kaolin is a hydrated aluminium silicate (white clay) with absorbent and purifying properties. It operates through ion exchange: it releases minerals to the skin surface and binds toxins and impurities. In ReSkin, CI 77007 (Ultramarine Blue, derived from kaolin processing) also imparts the product's characteristic hue.
The protection and repair system completes the formulation framework:
Tocopheryl Acetate (stabilised Vitamin E) The benchmark liposoluble antioxidant. It protects the lipids of the intercellular lamellar membrane from oxidation — a silent but continuous damage mechanism that traditional cleansing accelerates by exposing fresh lipids to the environment.
Panthenol (Provitamin B5) A precursor of pantothenic acid, a cofactor of Coenzyme A. It has documented moisturising, pro-reparative and epithelialising properties. It contributes to the maintenance of barrier function.
Pentylene Glycol A solvent with ancillary antimicrobial activity. It contributes to product preservation with a favourable toxicological profile and complementary humectant properties.
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THE FIVE SIMULTANEOUS ACTIONS — IN SUMMARY
ReSkin does not add five actions together: it integrates them into a single formulative gesture. Every functional component has been selected because it does not interfere with the others — and in many cases enhances them.
1 — Physiological cleansing
Poloxamer 184 + Polyglyceryl-3 Methylglucose Distearate. A non-ionic system that solubilises impurities without intercalating into the lipid lamellae. The structural lipid film remains untouched.
2 — Smoothing by buffing
Walnut shell powder + Cellulose microgranules + Rice starch. A tripartite system of decreasing hardness that smooths corneocyte irregularities without shearing force. The corneodesmosomes remain intact.
3 — NMF-mimetic hydration
Urea + Betaine + Glycerol + Lactose. Four components that restore water and natural moisturising factors to the stratum corneum during cleansing, not after. The hydration void is never created.
4 — Neurosensory desensitisation
4-t-Butylcyclohexanol. A TRPV1 modulator that prevents nociceptor activation during the mechanical action. It enables use on sensitised and reactive skin.
5 — Purification and lipid rebalancing
Kaolin (ionic purification) + Sweet almond oil + Grape seed oil + Vitamin E (lipid restoration and antioxidant protection). The net lipid balance is in equilibrium, not in deficit.
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WHY RESKIN IS UNIQUE — IN SUMMARY
ReSkin is not a better product within its category. It is a product that steps outside the category.
It is not a gentle scrub — it is a smoothing system without cell detachment. It is not a mild cleanser — it is a cleansing system that does not touch the barrier. It is not a moisturiser with cleansing properties — it is a system that cleanses and hydrates simultaneously because the formula does not create the deficit that hydration would need to fill.
✦ Contains no anionic surfactants — the lipid barrier is not stripped
✦ Contains no acids — pH is not forced
✦ Does not tear corneocytes — smooths surface irregularities
✦ Mimics physiological desquamation — via biomimetic enzymatic action
✦ Restores NMF during cleansing — not after
✦ Protects nociceptors — making use safe on reactive skin
✦ Restores biocompatible lipids — net balance in equilibrium
ReSkin is the formulative answer to a question that modern cosmetics has stopped asking: is it possible to cleanse, smooth, hydrate and protect the skin in a single step, without any of these actions compromising the others?
The answer is yes. But it requires a paradigm shift: to stop treating the stratum corneum as an enemy and to begin respecting its physiology.
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SCIENTIFIC NOTE
References and foundations
The formulation of ReSkin is grounded in consolidated scientific evidence relating to stratum corneum physiology and ingredient–barrier interactions:
1. Kligman AM. 'Corneobiology and corneotherapy — a final chapter.' Int J Cosmet Sci, 2011; 33(3): 197–209.
2. Elias PM, Feingold KR. 'Skin Barrier.' Taylor & Francis, 2006. Reference text on skin barrier biology.
3. Rawlings AV, Harding CR. 'Moisturization and skin barrier function.' Dermatol Ther, 2004; 17 Suppl 1: 43–48.
4. Caubet C et al. 'Degradation of corneodesmosome proteins by two serine proteases of the kallikrein family, SCTE/KLK5 and SCCE/KLK7.' J Invest Dermatol, 2004; 122(5): 1235–1244.
5. Voegeli R et al. 'Profiling of serine protease activities in human stratum corneum and detection of a stratum corneum tryptase-like enzyme.' Int J Cosmet Sci, 2007; 29(3): 191–200.
6. Walters KA, Roberts MS. 'The structure and function of skin.' In: Dermatological and Transdermal Formulations. CRC Press, 2002.
7. Lodén M. 'Role of topical emollients and moisturizers in the treatment of dry skin barrier disorders.' Am J Clin Dermatol, 2003; 4(11): 771–788.
8. Fluhr JW et al. 'Glycerol and the skin: holistic approach to its origin and functions.' Br J Dermatol, 2008; 159(1): 23–34.
9. Danby SG et al. 'Effect of olive and sunflower seed oil on the adult skin barrier: implications for neonatal skin care.' Pediatr Dermatol, 2013; 30(1): 42–50. [Reference for the impact of vegetable oils on the barrier]
10. Yosipovitch G et al. 'Role of TRPV1 in itch and pain perception.' In: TRP Channels in Sensory Transduction. Springer, 2015.
11. Menon GK, Cleary GW, Lane ME. 'The structure and function of the stratum corneum.' Int J Pharm, 2012; 435(1): 3–9.
NATINUEL — ReSkin
Science in the service of cutaneous physiology
A product that does not aggress, does not tear, does not force.
It respects.
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