Sunscreen Explained: How to Protect Your Skin Properly

Sunscreen is one of the most effective tools for preventing sun damage, yet it is often misunderstood or misused. Knowing how sunscreen works helps you protect your skin more effectively.

What Sunscreen Does

Sunscreens protect the skin by either absorbing UV radiation (chemical sunscreens) or reflecting it (mineral sunscreens). Both types can be effective when used correctly.

Understanding SPF

SPF (Sun Protection Factor) measures protection against UVB rays. An SPF of 30 blocks approximately 97% of UVB rays when applied properly.

Common Sunscreen Mistakes

• Applying too little

• Not reapplying after sweating or swimming

• Skipping cloudy days

• Forgetting areas like ears, neck, and hands

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How Much Sunscreen Do You Need?

Most adults need about one ounce (a shot-glass amount) to cover exposed areas adequately.

Sunscreen and Skin Types

Different formulations suit different skin needs, including sensitive, oily, or acne-prone skin. Choosing the right product improves comfort and consistency.

Daily Sunscreen as Skin Care

Regular sunscreen use protects collagen, prevents pigmentation, and supports long-term skin health beyond cosmetic benefits.

Do you reapply sunscreen during the day when you’re outdoors?

Sources:

https://www.aad.org

https://www.health.harvard.edu

https://www.cdc.gov