07/01/2026
🧴 The Science Behind Sunscreen — What Influencers Don’t Explain | Dr. Sasi Kiran Attili | Best Dermatologist | Vizag
◼️ Sunscreen is not just a cosmetic product — it’s a scientifically designed protective shield for your skin.
✅ Let’s understand what actually happens when you apply sunscreen.
🔬 How Sunscreen Really Works:
1️⃣ Chemical filters (like Avobenzone, Octinoxate)
They absorb UV radiation and convert it into harmless heat before it damages skin cells.
2️⃣ Physical (mineral) filters (like Zinc Oxide, Titanium Dioxide)
They reflect and scatter UV rays away from the skin like tiny mirrors.
👉 Most modern sunscreens are hybrid — combining both for better protection and cosmetic feel.
☀️ Why “Broad Spectrum” Matters:
📌 UV rays are of two harmful types:
• UVA → causes premature ageing, wrinkles, pigmentation & DNA damage
• UVB → causes sunburn and increases skin cancer risk
✅ Broad-spectrum sunscreen protects against both UVA & UVB, not just tanning.
🧪 Why Reapplication Is Necessary:
Sweat, oil, touching your face and sunlight break down sunscreen filters, which is why protection drops after 2–3 hours.
◼️ That’s why dermatologists recommend reapplying every 2–3 hours when outdoors.
💡 Dermatologist Tip:
👉 Use SPF 30+ with PA+++ or higher, apply enough quantity (two finger lengths for face & neck), and reapply when outdoors.
☀️ Sunscreen is not a beauty trend — it’s preventive medicine for your skin.
👨⚕️ Consult Our Expert:
Dr. Sasi Kiran Attili
MRCP (Dermatology), Dip. Dermatopathology
🏥 Visakha Institute of Skin & Allergy
📍 Address: 16-1-22/3, Coastal Battery Rd, Opp. Apex Hospital, Collector Office, Krishna Nagar, Maharani Peta, Visakhapatnam, Andhra Pradesh – 530002
📞 Phone: 77993 50193