Lesson 1Soothing and anti-inflammatory actives: panthenol, niacinamide, bisabolol for scalp tolerance and sensory benefitsHere we cover soothing and anti-inflammatory actives dat support scalp comfort in damaged-hair routines. You go study panthenol, niacinamide, bisabolol, and how dem influence barrier function, redness, itch, and overall sensory perception.
Scalp barrier and inflammation basicsPanthenol for hydration and soothingNiacinamide for barrier and rednessBisabolol and botanical anti-irritantsSensory testing and consumer perceptionFormulation limits and compatibilityLesson 2Lipids, ceramides and fatty alcohols: replenishing the lipid mantle, repairing cuticle gaps, improving barrier functionDis section look at lipids, ceramides, and fatty alcohols dat reinforce de hair lipid barrier. You go learn how dem fill cuticle gaps, reduce porosity, improve smoothness, and support long-term resistance to mechanical and chemical stress.
Hair lipid layer composition overviewCeramides and cuticle gap fillingCholesterol and 18-MEA restorationFatty alcohols as structuring emollientsPorosity reduction and strength gainsSynergy with proteins and conditionersLesson 3Proteins and peptides: hydrolyzed proteins, amino acids, keratin-derived peptides and mechanism of temporary repairDis section focus on proteins, peptides, and amino acids used for temporary repair. You go learn how size, charge, and hydrolysis degree affect penetration, film formation, strength, and how to balance stiffness with softness.
Protein damage markers in hair fibersHydrolyzed proteins and molecular weightKeratin-derived peptides and targetingFree amino acids and moisturizationFilm formation, strength, and brittlenessAllergy, labeling, and vegan alternativesLesson 4Oils and esters: vegetable vs synthetic esters, penetration vs surface lubricationDis section explore oils and esters dat lubricate, protect, and sometimes penetrate hair. You go compare natural oils and synthetic esters, understand fatty acid profiles, penetration depth, and how dem influence frizz, gloss, and breakage.
Cuticle lubrication and friction reductionPenetrating versus surface oilsVegetable oils and fatty acid profilesSynthetic esters and sensorial tuningOcclusion, gloss, and frizz controlRancidity, oxidation, and product stabilityLesson 5Surfactants and mild cleansing systems: sulfate vs sulfate-free (anionic, amphoteric, nonionic) and impact on damaged hairDis section analyze surfactant systems for cleansing damaged hair with minimal additional harm. You go compare sulfates and sulfate-free blends, examine anionic, amphoteric, and nonionic roles, and design milder yet effective systems.
Surfactant types and micelle formationSulfate surfactants and damage potentialAmphoteric and nonionic mildness boostersCoacervates and conditioning during washFoam quality versus gentleness balanceScalp tolerance and rinse-off optimizationLesson 6Silicones and film-formers: volatile vs non-volatile silicones, PVP/VA, dimethicone — shine, smoothness, and protectionDis section cover silicones and film-formers dat create protective, smoothing layers on hair. You go compare volatile and non-volatile silicones, PVP/VA and acrylics, and learn how films affect shine, frizz, heat protection, and buildup.
Volatile versus non-volatile siliconesDimethicone grades and viscosity selectionAmino-functional silicones and depositionPVP/VA and acrylic film-former propertiesHeat, UV, and mechanical protection rolesManaging buildup and silicone-free claimsLesson 7Humectants and moisturizers: glycerin, propylene glycol, hyaluronic acid — water retention vs hygral fatigueHere we examine humectants and moisturizers dat manage hair water content. You go compare glycerin, glycols, and hyaluronic acid, understand water binding versus hygral fatigue, and learn how climate and porosity guide humectant levels.
Water in hair fiber structureGlycerin and classic polyol humectantsPropylene glycol and related glycolsHyaluronic acid weight and film behaviorHygral fatigue and swelling controlClimate, porosity, and usage guidelinesLesson 8Preservatives, chelators, pH adjusters and antioxidants: ensuring stability and preventing further oxidative damageDis section detail support ingredients dat protect formulas and hair from degradation. You go learn how preservatives, chelators, pH adjusters, and antioxidants maintain microbiological safety, stability, and limit further oxidative damage.
Microbial risks in damaged-hair productsPreservative systems and regulatory limitsChelators, hard water, and metal-catalyzed damagepH adjusters and cuticle integrityAntioxidants against oxidative stressStability testing and packaging choicesLesson 9Cationic conditioners and polymers: quaternized cellulose, polyquaterniums — adsorption, deposition, and slipHere we explore cationic conditioners and polymers dat adsorb onto damaged hair. You go study charge density, substantivity, buildup, and how quats and polyquats influence combability, slip, volume, and long-term hair feel.
Cationic charge and damaged hair bindingQuaternized cellulose structure and functionKey polyquaterniums and performance profilesAdsorption, deposition, and rinse-off behaviorSlip, combability, and sensorial assessmentBuildup control and clarifying strategiesLesson 10Bond-rebuilding chemistries: bis-aminopropyl diglycol dimaleate, polyfunctional crosslinkers and how they restore disulfide/peptide interactionsDis section explain bond-rebuilding chemistries dat target broken disulfide and peptide linkages. You go learn key molecules, dem reaction pathways, realistic repair limits, and how to formulate dem without destabilizing other actives.
Hair damage and disulfide bond breakageBis-aminopropyl diglycol dimaleate mechanismPolyfunctional crosslinkers and network densityPeptide backbone interactions and limitsFormulation compatibility and stabilitySafety, irritation, and marketing claims
