ZOE Science & Nutrition The 3 biggest myths about anti-aging skincare | Prof. John McGrath
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Jun 12, 2025 
In this discussion, Professor John McGrath, a leading expert in molecular dermatology, reveals the truth behind common skincare myths. He debunks misconceptions about collagen supplements and dispels the belief that any product can reverse aging. The conversation delves into how skin truly ages, factors influencing its health, and the crucial role of sun protection. John emphasizes the importance of understanding scientific evidence over marketing hype, while highlighting a simple daily choice that can genuinely support skin health.
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Skin's Dynamic Protective Role
- Skin is a dynamic organ that replaces its outer layer every four weeks.
- It functions as a barrier and has roles in immune defense, hormone, and vitamin production.
Skin's Microbiome Importance
- The skin has its own microbiome with twice the number of cells as human skin cells.
- It influences skin health and disease susceptibility, but science is still uncovering its full potential.
Dual Causes of Skin Aging
- Skin aging has intrinsic (natural) and extrinsic (environmental) causes.
- Aging skin becomes drier, more wrinkled, and sagging due to natural processes.