Assoc. Prof. Muhammet Emin Çam
Rector Advisor, Vice Dean, and Faculty Member - Istanbul Kent University, Faculty of Pharmacy, Departmant of Pharmocology
Visiting Researcher&Lecturer -  University College London, Mechanical Engineering and Faculty of Medicine, UK
Visiting Lecturer - University of Aveiro, Faculty of Biomedical Engineering, Portugal
"This comprehensive table, answering all the questions about sunscreen usage, will help you make the right choices in protecting your skin and preventing aging."
EVERYTHING YOU WONDER ABOUT SUNSCREENS

EVERYTHING YOU WONDER ABOUT SUNSCREENS

Question Answer
When should sunscreen be applied? 15-30 minutes before going outside.
How often should it be reapplied? Every 2 hours or after sweating.
What is SPF, and what should it be? SPF indicates protection against UVB rays. SPF 30+ is recommended for daily use.
Is there a difference between SPF 50 and 100? Protection gain is minimal after SPF 50, difference is about 1-2%.
Should sunscreen go under or over makeup? Sunscreen should be applied before makeup.
Is sunscreen needed indoors? UV rays can pass through windows, so it may be necessary indoors too.
What’s the difference between mineral and chemical sunscreens? Mineral filters act as a physical barrier; chemical filters absorb UV rays.
How should sunscreen be chosen according to skin type? Gel form for oily skin, moisturizing cream for dry skin.
What does water-resistant sunscreen mean? It remains effective for 40-80 minutes after water exposure.
Does sunscreen prevent skin aging? Yes, it prevents photoaging by protecting against UVA rays.