Does sunscreen prevent premature aging?

Does sunscreen help wrinkles?

Sunscreen helps prevent wrinkles caused by repeated sun exposure. This accelerated aging is called photoaging. UVA reaches the deeper skin layer containing collagen and elastin, the proteins that give skin firmness and elasticity. UVB also contributes to photoaging, so avoiding sunburn alone is not enough.23

Visible improvements have been observed in women who used broad spectrum facial sunscreen daily for a year: they looked younger afterward compared with women who did not use sunscreen. Think in terms of sustained protection rather than an immediate cosmetic change. Taking a photograph each month can help you track changes without relying on memory.4

Can sunscreen reverse sun damage?

Sunscreen helps prevent further damage; it cannot undo UV damage to skin cells' DNA. The appearance of sun damaged skin can still improve with treatments that reduce wrinkles, discoloration and roughness. Prevention and repair are different jobs, even if skincare packaging would prefer to put them both on the same bottle. A dermatologist can discuss options such as retinoids, lightening treatments, peels or lasers based on the changes you want to address.2

Which sunscreen should you choose?

Choose broad spectrum protection, SPF 30 or higher, and water resistance. SPF mainly describes UVB protection; broad spectrum means protection against UVA as well. A bigger SPF number is not a substitute for checking both. Chemical and mineral sunscreens primarily protect by absorbing UV radiation.15

Creams suit dry skin, while gels suit oily skin and hairy areas. For sensitive skin, consider a mineral sunscreen containing zinc oxide, titanium dioxide or both.1

How often should I wear sunscreen to prevent aging?

Make sunscreen the last step of your morning skincare routine, after moisturizer. Use it year round, including cloudy days and when spending time near windows or driving. UVA can pass through glass. Pay attention to exposed hands as well as your face, neck and ears.35

1. 1Apply sunscreen to dry skin 15 minutes before going outdoors.
2. 2Use at least 1 teaspoon for your face. Most adults need at least 1 ounce to cover all skin not covered by clothing.
3. 3Cover exposed areas, including your ears, neck, feet and scalp. Protect your lips with SPF 30 or higher lip balm.
4. 4Reapply approximately every two hours outdoors and after swimming or sweating, following the bottle's directions.

Add shade and protective clothing rather than relying on sunscreen alone. Seek shade especially between 10 a.m. and 2 p.m., and use a wide brimmed hat and sunglasses with UV protection. A higher SPF does not let you skip reapplication.13

When do you need extra care?

Every skin tone is susceptible to sun damage, even without an obvious sunburn. Some medicines increase sensitivity to sunlight; ask your pharmacist or healthcare provider whether yours do. If you notice a spot that itches, changes or bleeds, make an appointment with a dermatologist rather than treating it as a cosmetic aging concern.23