Basic knowledge on skin Structure of skin What role does skin play in our bodies? What is skin's structure? How does skin keep its moisture? Does our skin's structure change over time? What is the difference between moisturized skin and dry skin? Does stress affect skin? Can I relieve stress through daily skin care? Barrier function What is the skin's barrier function? How is the skin's barrier function supported? What is the role of ceramide in our skin? What happens when skin's barrier function is weakened? What will cause skin’s barrier function to change? How do we know if skin's barrier function is weak or strong? Dry and sensitive skin What skin types are considered sensitive skin? What is sensitive skin?