Skin Anatomy & Absorption Explained: How Peptides Work in Skincare + Top Tips for Beginners (2026 Guide)

Don't Get Played By Marketing... 

 

In this 20-minute masterclass, we break down skin anatomy (epidermis, dermis, hypodermis), how ingredients actually penetrate the barrier (intercellular, transcellular, transfollicular routes + 500 Dalton rule), and why peptides like Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Acetyl Hexapeptide-8, Palmitoyl Pentapeptide-4, and Decapeptide-52 are game-changers for anti-aging, firmness, and glow. We cover TEWL, stratum corneum, hydrolipidic film, diet tips (vitamin C, omega-3s, zinc), and procedures like microneedling/PRP. No fluff—just science-backed strategies to upgrade your routine.

 

• Intro
• Disclaimer & Frame
• The Three Layers of Skin
• Stratum Corneum & Hydrolipidic Film
• Penetration vs Absorption
• The Three Entry Routes
• 500 Dalton Rule
• Step-by-Step Permeation
• Factors Controlling Absorption
• Practical Protocols
• Transition to Peptides
• Close & Sign-Off

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