Lesson 1Soothin an anti-inflammatory actives: panthenol, niacinamide, bisabolol fi scalp tolerance an sensory benefitsHere wi cover soothin an anti-inflammatory actives dat support scalp comfort in damaged-hair routines. Yuh wi study panthenol, niacinamide, bisabolol, an how dem influence barrier function, redness, itch, an overall sensory perception. Dem help ease scalp issues.
Scalp barrier an inflammation basicsPanthenol fi hydration an soothinNiacinamide fi barrier an rednessBisabolol an botanical anti-irritantsSensory testin an consumer perceptionFormulation limits an compatibilityLesson 2Lipids, ceramides an fatty alcohols: replenishing di lipid mantle, repairin cuticle gaps, improvin barrier functionDis section examine lipids, ceramides, an fatty alcohols dat reinforce di hair lipid barrier. Yuh wi learn how dem fill cuticle gaps, reduce porosity, improve smoothness, an support long-term resistance to mechanical an chemical stress. Dem restore hair protection.
Hair lipid layer composition overviewCeramides an cuticle gap fillinCholesterol an 18-MEA restorationFatty alcohols as structurin emollientsPorosity reduction an strength gainsSynergy wid proteins an conditionersLesson 3Proteins an peptides: hydrolyzed proteins, amino acids, keratin-derived peptides an mechanism a temporary repairDis section focus on proteins, peptides, an amino acids used fi temporary repair. Yuh wi learn how size, charge, an hydrolysis degree affect penetration, film formation, strength, an how to balance stiffness wid softness. Dem help fix hair temporarily.
Protein damage markers in hair fibersHydrolyzed proteins an molecular weightKeratin-derived peptides an targetinFree amino acids an moisturizationFilm formation, strength, an brittlenessAllergy, labelin, an vegan alternativesLesson 4Oils an esters: vegetable vs synthetic esters, penetration vs surface lubricationDis section explore oils an esters dat lubricate, protect, an sometimes penetrate hair. Yuh wi compare natural oils an synthetic esters, understand fatty acid profiles, penetration depth, an how dem influence frizz, gloss, an breakage. Dem make hair shine.
Cuticle lubrication an friction reductionPenetratin versus surface oilsVegetable oils an fatty acid profilesSynthetic esters an sensorial tuninOcclusion, gloss, an frizz controlRancidity, oxidation, an product stabilityLesson 5Surfactants an mild cleansin systems: sulfate vs sulfate-free (anionic, amphoteric, nonionic) an impact on damaged hairDis section analyze surfactant systems fi cleansin damaged hair wid minimal additional harm. Yuh wi compare sulfates an sulfate-free blends, examine anionic, amphoteric, an nonionic roles, an design milder yet effective systems. Dem clean widout damage.
Surfactant types an micelle formationSulfate surfactants an damage potentialAmphoteric an nonionic mildness boostersCoacervates an conditionin durin washFoam quality versus gentleness balanceScalp tolerance an rinse-off optimizationLesson 6Silicones an film-formers: volatile vs non-volatile silicones, PVP/VA, dimethicone — shine, smoothness, an protectionDis section cover silicones an film-formers dat create protective, smoothin layers on hair. Yuh wi compare volatile an non-volatile silicones, PVP/VA an acrylics, an learn how films affect shine, frizz, heat protection, an buildup. Dem give hair shine.
Volatile versus non-volatile siliconesDimethicone grades an viscosity selectionAmino-functional silicones an depositionPVP/VA an acrylic film-former propertiesHeat, UV, an mechanical protection rolesManagin buildup an silicone-free claimsLesson 7Humectants an moisturizers: glycerin, propylene glycol, hyaluronic acid — water retention vs hygral fatigueHere wi examine humectants an moisturizers dat manage hair water content. Yuh wi compare glycerin, glycols, an hyaluronic acid, understand water bindin versus hygral fatigue, an learn how climate an porosity guide humectant levels. Dem keep hair moist.
Water in hair fiber structureGlycerin an classic polyol humectantsPropylene glycol an related glycolsHyaluronic acid weight an film behaviorHygral fatigue an swellin controlClimate, porosity, an usage guidelinesLesson 8Preservatives, chelators, pH adjusters an antioxidants: ensurin stability an preventin further oxidative damageDis section detail support ingredients dat protect formulas an hair from degradation. Yuh wi learn how preservatives, chelators, pH adjusters, an antioxidants maintain microbiological safety, stability, an limit further oxidative damage. Dem keep products safe.
Microbial risks in damaged-hair productsPreservative systems an regulatory limitsChelators, hard water, an metal-catalyzed damagepH adjusters an cuticle integrityAntioxidants against oxidative stressStability testin an packagin choicesLesson 9Cationic conditioners an polymers: quaternized cellulose, polyquaterniums — adsorption, deposition, an slipHere wi explore cationic conditioners an polymers dat adsorb onto damaged hair. Yuh wi study charge density, substantivity, buildup, an how quats an polyquats influence combability, slip, volume, an long-term hair feel. Dem make hair easy fi comb.
Cationic charge an damaged hair bindinQuaternized cellulose structure an functionKey polyquaterniums an performance profilesAdsorption, deposition, an rinse-off behaviorSlip, combability, an sensorial assessmentBuildup control an clarifyin strategiesLesson 10Bond-rebuildin chemistries: bis-aminopropyl diglycol dimaleate, polyfunctional crosslinkers an how dem restore disulfide/peptide interactionsDis section explain bond-rebuildin chemistries dat target broken disulfide an peptide linkages. Yuh wi learn key molecules, dem reaction pathways, realistic repair limits, an how to formulate dem widout destabilizin other actives. Dem fix broken bonds.
Hair damage an disulfide bond breakageBis-aminopropyl diglycol dimaleate mechanismPolyfunctional crosslinkers an network densityPeptide backbone interactions an limitsFormulation compatibility an stabilitySafety, irritation, an marketin claims
