Regenine is a cationic phytocomplex of plant origin — chemically Hydroxypropyltrimonium Hydrolyzed Corn Starch — capable of binding electrostatically to hair keratin to smooth the cuticle, reduce frizz, and reinforce the fiber. Hairswiss analyzes its mechanism of action and presents the professional products that integrate it.
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Hair Keratin: Molecular Structure, Mechanism of Action and Professional Use
Hair keratin is an α-scleroprotein whose strength is based on disulfide bonds (S–S) between cysteine residues. In cosmetics, only hydrolyzed keratin — fragmented into peptides of 300 to 10,000 Da — can act on the fiber. Hairswiss explains the exact chemistry, mechanisms of action, and real limits of this essential active ingredient.
Dimethicone in Hair Care: Chemistry of Heavy Silicones, Deposition Mechanism and Professional Use
Dimethicone is a linear polydimethylsiloxane (PDMS) whose viscosity — expressed in centistokes (cSt) — directly determines its behavior on the hair fiber: light fractions (50–200 cSt) partially penetrate the cuticle; heavy fractions (>1,000 cSt) form an occlusive surface film. Hairswiss analyzes its molecular chemistry, deposition mechanism and the controversies surrounding accumulation on the fiber.
Fatty Alcohols in Hair Care: Chemistry, Emollient Mechanism and INCI Guide
Fatty alcohols (cetyl, stearyl, cetearyl C16–C18) are structurally distinct from ethyl alcohol: their long aliphatic chain gives them emollient, emulsion-stabilizing, and occlusive properties on the hair fiber. Hairswiss analyzes their molecular mechanism of action and explains how to correctly identify them on an INCI list.
Panthenol (Provitamin B5): Chemistry, Fiber Penetration and Measurable Effects
Panthenol (provitamin B5) is one of the few cosmetic actives able to genuinely penetrate the hair cortex thanks to its low molecular weight (205 Da). Its polyol structure gives it marked hygroscopicity, while its accumulation in the fiber increases hair diameter by 8 to 10%. Hairswiss analyzes its exact chemistry and triple mechanism of action.
Chemistry of Professional Hair Coloration: Techniques, Mechanisms and Developments
Professional hair coloration evolves rapidly — fragmented balayage, bond builders, ammonia-free colorations, direct pigments. Hairswiss analyzes the chemical mechanisms behind these techniques and what each development concretely implies for salon work.
Hyaluronic Acid in Hair Care: Molecular Weight, Penetration and Mechanisms of Action
Hyaluronic acid in hair care is not a single active: its action depends entirely on its molecular weight. Fractions >1,000 kDa form a surface film; fractions <50 kDa penetrate the cortex. Hairswiss analyzes the biochemistry, interaction mechanisms with keratin, and measurable benefits by hair type.
Hair Dryness: Understanding the Mechanisms and Moisturizing Actives
Hair dryness is not a uniform condition. Hairswiss distinguishes its three origins (lipid, protein, sebaceous) and explains the chemistry of moisturizing actives — humectants, occlusives, emollients — to help professionals formulate a precise technical response.
Sulfate-Free Formulations: Chemistry, Compromises and Professional Use
Sulfate-free formulations replace SLS and SLES with amphoteric, non-ionic, or amino-acylated surfactants. Hairswiss analyzes the comparative chemistry of these alternatives, their mechanisms of action on the cuticle, and the cases where their use is genuinely justified in a professional context.
Personalized Hair Formulation: The Science Behind “Custom-Made”
Personalization of hair care products is not a slogan: it is a chemical necessity. Hairswiss analyzes the four measurable hair variables (diameter, porosity, hydration, curvature) and explains which actives — surfactants, cationic polymers, proteins — to adapt according to each fiber profile.
Hair Biology: What Science Says About Hair Health
Hair health is not a matter of routine, but of biology. Hairswiss analyzes the structure of the hair fiber at the molecular level — cuticle, cortex, disulfide bonds, follicle — and explains how nutrients, heat, and chemical aggressions concretely affect the hair.
The Hair Follicle: Anatomy, Biological Cycle and Degradation Factors
The hair follicle is a multi-compartment structure with an autonomous biological cycle — anagen phase (2-7 years), catagen (2-3 weeks), telogen (3-4 months). Hairswiss describes its precise anatomy, growth regulation mechanisms, and the follicular degradation factors essential to master in a professional context.
Ammonium Hydroxide in Hair Dyes: Chemistry, Risks and Professional Safety
Ammonium Hydroxide, often criticized and misunderstood, is a key ingredient in many hair products, especially permanent dyes. This article delves into its chemistry, uses, benefits, risks, and environmental impact, offering a complete analysis of its role in the cosmetics industry.
Vegetable Keratin: What This Term Really Hides Behind the INCI Chemistry
«Vegetable keratin» does not exist biochemically: it refers to hydrolyzed wheat, soy, or corn proteins, poor in cysteine and therefore unable to reconstitute disulfide bonds. Hairswiss clarifies the difference from animal keratin and explains what these actives actually do on the fiber.
Argan Oil: Fatty Acid Chemistry, Antioxidants and Professional Use
Argan oil is distinguished by its unique fatty acid profile (ω-9 oleic ~46%, ω-6 linoleic ~33%), its high-concentration tocopherols, and specific phytosterols (schottenol, spinasterol). Hairswiss analyzes its chemistry and role in professional hair formulations.
Sodium C14-16 Olefin Sulfonate: Chemistry, Safety and Professional Shampoos
Sodium C14-16 Olefin Sulfonate is a synthetic anionic surfactant obtained by sulfonation of C14–C16 alpha-olefins. Its amphiphilic structure gives it high detergency and excellent performance in hard water, with a lower irritation profile than SLS. Hairswiss analyzes its molecular chemistry, surfactant properties and role in professional shampoos.
Denatured Alcohol in Hair Care: Chemistry, Risks and Professional Guide
Denatured Alcohol (Alcohol Denat., ethanol C2H5OH, MW 46 Da) is a short-chain, volatile and water-miscible alcohol whose drying effect on the hair fiber results from the solubilization of intercuticular lipids and surface water entrainment by evaporation. Hairswiss analyzes its chemistry, problematic concentration thresholds and professional formulation alternatives.
Lavender Oil for Hair: Anti-Frizz Chemistry and Scalp Benefits
Lavender essential oil (Lavandula angustifolia) is a multifunctional active in hair cosmetology: its terpene esters — primarily linalyl acetate (MW 196 Da, ~40–50%) and linalool (MW 154 Da, ~25–35%) — exert an anti-inflammatory action on the scalp, a mild antimicrobial and an antistatic effect on the fiber. Hairswiss analyzes the exact chemistry and mechanism of action on the hair structure.
Hydrolyzed Keratin and Macadamia Oil: Molecular Complementarity on the Hair Fiber
Hydrolyzed keratin (peptides 300–10,000 Da) and macadamia oil (60–85% palmitoleic acid ω-7, rare in cosmetics) form a complementary formulation association: the protein fills cuticle gaps, the oil reconstitutes the surface lipid film. Hairswiss analyzes their mechanisms of action and synergy on degraded hair fibers.
Prebiotics and Probiotics for the Scalp: Microbiome, Composition and Mechanisms of Action
The scalp microbiome — dominated by Malassezia, Cutibacterium and Staphylococcus epidermidis — regulates local pH, sebum production, and the cutaneous barrier. Prebiotics (fructooligosaccharides, inulin) selectively feed beneficial bacteria; probiotic lysates (Lactobacillus ferment) act on TLR receptors of the epidermis. Hairswiss analyzes the molecular mechanisms and the limits of these actives in cosmetic formulation.