How Does Sunscreen Work? | Your Shield Against the Sun
The sun is essential for life, but it also comes with risks. The UVA and UVB rays in sunlight can damage our skin. That’s why dermatologists always recommend using sunscreen. But have you ever wondered how sunscreen actually works? 🤔
The Harmful Rays of the Sun
. UVB rays → cause sunburn.
. UVA rays → penetrate deeper, leading to wrinkles, premature aging, and higher risk of skin cancer.
A good sunscreen protects against both, and this is called Broad Spectrum Protection.
Two Main Types of Sunscreens
- Physical (Mineral) Sunscreen
. Contains Zinc Oxide and Titanium Dioxide.
. Works like a shield by reflecting UV rays away from the skin.
. Starts working immediately after application.
. Great for sensitive skin.
Downside: may leave a white cast (though modern formulas are much better).
- Chemical Sunscreen
. Contains ingredients that absorb into the skin.
. These act like a sponge, soaking up UV rays and converting them into harmless heat.
. Lightweight, invisible, and easy for daily use.
. Needs 15–20 minutes to become effective.
. May irritate sensitive skin in some cases.
What is SPF?
. SPF (Sun Protection Factor) only measures protection against UVB rays.
. The higher the SPF, the longer the protection.
. But always look for Broad Spectrum on the label to ensure UVA protection too.
How to Use Sunscreen Correctly
. Apply 15 minutes before sun exposure.
. Use about a shot glass full for the whole body.
. Reapply every 2 hours.
. Reapply immediately after swimming or sweating.
. Bottom Line
Sunscreen is your invisible bodyguard. It helps protect your skin from:
. Sunburn
. Premature aging
. Skin cancer risks
So next time you step outside, remember:
Sunscreen is your skin’s best friend.
Which type of sunscreen do you prefer: physical or chemical? Share your thoughts in the comments!