Lesson 1Antimicrobials an microbiome-friendly actives: benzoyl peroxide, azelaic acid, topical antimicrobials an resistance considerationsDis section cover topical antimicrobials an microbiome-conscious actives, including benzoyl peroxide an azelaic acid. It review mechanisms, resistance concerns, microbiome shifts, an strategies to limit dysbiosis while treating disease.
Benzoyl peroxide: bactericidal action an irritationAzelaic acid: antimicrobial an anti-inflammatoryTopical antibiotics an resistance mitigationMicrobiome shifts in acne an dermatitisNon-antibiotic antimicrobial strategiesCombining antimicrobials wid barrier supportLesson 2Surfactants an cleansers: non-foaming vs foaming, pH an barrier impactDis section analyze surfactant chemistry an cleanser design, contrasting foaming an non-foaming systems. It cover pH, lipid extraction, barrier disruption, an ow to choose cleansers fi acne, rosacea, atopic skin, an post-procedure care.
Anionic, amphoteric, an nonionic surfactant classesFoaming vs non-foaming systems an skin feelCleanser pH, acid mantle, an TEWL changesSyndets vs true soaps in dermocosmeticsCleanser selection fi acne an oily skinCleansers fi atopic, rosacea, an aged skinLesson 3Sunscreen filters: chemical vs mineral filters, UVA/UVB coverage, photostability, an vehicle effectsDis section examine organic an mineral sunscreen filters, UVA an UVB coverage, an photostability. It discuss vehicles, film formation, cosmetic elegance, an ow filters interact wid other actives in dermocosmetic regimens.
UVA vs UVB: action spectra an skin outcomesOrganic filters: mechanisms an safety profileMineral filters: particle size an whiteningPhotostability, filter pairing, an boostersVehicle types, film formation, an adherenceCombining sunscreens wid irritant-prone activesLesson 4Anti-inflammatory an barrier-repair agents: niacinamide, panthenol, ceramides, cholesterol, fatty acidsDis section explore anti-inflammatory an barrier-repair ingredients such as niacinamide, panthenol, ceramides, cholesterol, an fatty acids. It link molecular actions to clinical outcomes in acne, rosacea, atopic dermatitis, an irritant dermatitis.
Niacinamide: mechanisms, benefits, an limitsPanthenol an soothing of acute irritationCeramide subclasses an lamellar organizationCholesterol an fatty acids in barrier balanceOptimal ceramide:cholesterol:fatty acid ratiosBarrier repair in atopic an irritant dermatitisLesson 5Preservatives, fragrance, an common sensitizers: parabens, formaldehyde releasers, essential oilsDis section review preservatives, fragrance components, an classic sensitizers. It explain mechanisms of preservation, typical allergenic pathways, patch test relevance, an ow to select lower-risk options fi sensitive or compromised skin.
Mechanisms of cosmetic preservation an stabilityParabens: safety data, myths, an regulatory statusFormaldehyde releasers an contact allergy riskFragrance mixes, essential oils, an sensitizationLabel reading fi fragrance-free an hypoallergenicPatch testing relevance an counseling patientsLesson 6Antioxidants an supportive actives: vitamin C (ascorbic acid), tocopherol, an niacinamide interactionsDis section review key antioxidant an supportive actives, focusing on vitamin C, vitamin E, an niacinamide. It cover stability, synergistic combinations, potential incompatibilities, an ow dese agents protect against oxidative stress.
Oxidative stress pathways in skin agingAscorbic acid forms, pH, an stabilizationTocopherol an lipid phase antioxidant synergyVitamin C an E co-formulation strategiesNiacinamide interactions wid acidic formulasAntioxidants in photoprotection regimensLesson 7Retinoids an retinaldehyde: efficacy, irritation management, an photosensitivityDis section detail topical retinoids, including retinol, retinaldehyde, an prescription analogs. It review mechanisms, antiaging an acne evidence, irritation pathways, photosensitivity issues, an strategies to build tolerance an combine actives.
Retinoid family overview an skin pharmacologyEvidence fi acne, photoaging, an dyschromiaRetinaldehyde vs retinol: potency an tolerabilityIrritation mechanisms an barrier impairmentRetinization protocols an buffering strategiesPhotosensitivity, photoprotection, an timingLesson 8Humectants an hydrators: hyaluronic acid, glycerin, propanediol — molecular weight considerationsDis section explore humectants an water-binding hydrators, including hyaluronic acid, glycerin, an propanediol. It explain molecular weight, penetration, tackiness, an ow to pair humectants wid occlusives to prevent barrier dehydration.
Mechanisms of humectancy an water bindingHyaluronic acid molecular weights an effectsGlycerin: efficacy, safety, an sensory profilePropanediol an multifunctional solvent rolesPairing humectants wid occlusives an emollientsHydrator choices fi oily vs very dry skinLesson 9Keratolytics an exfoliants: salicylic acid, glycolic acid, lactic acid — concentration, pH, an irritation riskDis section analyze keratolytics an exfoliants such as salicylic, glycolic, an lactic acids. It explain concentration, pH, penetration depth, an irritation risk, guiding safe use in acne, photoaging, dyschromia, an sensitive skin.
Beta-hydroxy vs alpha-hydroxy acid mechanismsRole of pH an concentration in acid potencySalicylic acid in acne an seborrheic skinGlycolic acid fi photoaging an dyschromiaLactic acid fi dry an sensitive-prone skinLayering acids wid retinoids an vitamin C
