Sunblock is essential for shielding the skin from the sun's damaging UV rays. It helps protect against both UVA and UVB rays, which contribute to sunburn, skin damage, and photoaging. The Skin Cancer Foundation recommends daily use of broad-spectrum sunscreen to reduce the risk of UV exposure.

How sunblock works

Sunblock contains active ingredients that either reflect or absorb UV light. Physical sunscreen, made with zinc oxide and titanium dioxide, sits on the skin's surface and blocks visible and UV rays. Chemical sunscreens, with ingredients like oxybenzone, avobenzone, and para-aminobenzoic acid, absorb radiation before it can cause skin damage.

SPF requirements and effectiveness

The FDA regulates SPF requirements to ensure sun protection. Higher SPF provides more defense, but no sunscreen is 100% effective. The detrimental effects of UV exposure can still occur if sunscreen isn't reapplied after sweating, swimming, or every two hours.

Choosing the right sunblock

To find the best sunblock, consider:

- Broad spectrum protection for blocking both UVA and UVB rays.

- Water-resistant (sweatproof) formulas for the beach, sports, or summer activities.

- Mineral sunscreens with zinc oxide or titanium dioxide for children and sensitive skin.

- Sunscreens containing antioxidants to combat sun damage.

- Avoiding chemicals that may raise safety concerns, such as some oils and fragrances.

Common myths about sunscreen

Some believe sunscreen blocks vitamin D absorption, but dermatologists say that daily use still allows the body to produce enough. Others think sunscreen isn’t needed on cloudy days, but UV rays penetrate clouds, making sunblock necessary.

Additional skin care tips

Besides sunscreen, wearing protective clothing, reapplying after swimming, and using insect repellent when outdoors helps maintain skin health. Tanning without protection increases vulnerable areas like the nose to sunburn and hurt from prolonged sunlight.

Using broad-spectrum sunscreen with the right sunscreen ingredients, such as filters like avobenzone and combination forms, is key to preventing skin damage. Whether you're at the beach or going about your day, applying SPF-formulated sunscreen is essential.

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