Dermatology Insights on
Sun Protection and Repair
Dr. Gray’s
Dr. Mark Gray
Dermatologist & Founder
MBChB, FRACP, FRCPC, FRCPA, ABPath, ABDermpath, FRSpecialist Dermatologist , Specialist Pathologist , Specialist Dermatopathologist , Cosmetic Surgeon, Mohs Surgeon.
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The Hidden Dangers of Sun Exposure: A Dermatologist's Wake-Up Call
In my 25 years as a dermatologist, I've witnessed the subtle yet devastating impact of sun exposure on skin health. What many dismiss as a harmless tan or freckle is often the early sign of cumulative UV damage. Ultraviolet radiation, particularly UVA and UVB rays, penetrates the skin, triggering a cascade of cellular changes that accelerate aging and increase cancer risk…
Micronized vs. Nanonized Mineral Sunscreens: Navigating Safety and Efficacy
Mineral sunscreens, using zinc oxide or titanium dioxide, have revolutionized suncare by providing physical barriers that reflect UV rays rather than absorbing them like chemicals. The key to their usability lies in particle size, but nanonized particles (nano <100 nm) raise concerns. Alarming stat…
The Indoor Sun Trap: Why Your Office Window Is a Skin Saboteur
Indoor UV is a sneaky foe—standard glass blocks UVB but lets 50-75% UVA through (Journal of Investigative Dermatology). A study of 84 office workers found those near windows had 170% more skin damage on exposed sides…
Myth Busting: The Truth About “Safe” Tanning and Its Hidden Costs
The "healthy tan" myth persists, but evidence debunks it. Tanning is skin's distress response to UV injury, producing melanin as a shield – but it's inefficient, blocking only 50-70% of rays (British Journal of Dermatology). A large-scale study of 30,000 Swedes found tanners had 50% higher melanoma risk…