How much sunscreen do you need to protect your skin?
Summary
Sunscreen helps protect your skin from harmful ultraviolet (UV) rays from the sun, which can cause skin damage and increase the risk of skin cancer. Experts say most people do not use enough sunscreen or apply it correctly, and it is important to use enough, reapply often, and take additional protective measures.Key Facts
- UV radiation from the sun can cause skin damage, aging, and skin cancer without visible sunburn.
- Some UV exposure is good for vitamin D production, which supports bones and the immune system.
- The UV Index shows how strong UV radiation is; if it is 3 or above, you should use sunscreen and cover up.
- Adults should apply about 6 to 8 teaspoons of sunscreen to cover the whole body.
- Sunscreen should be applied 30 minutes before sun exposure and reapplied every two hours or sooner if swimming or sweating.
- No sunscreen blocks UV rays completely, so wearing protective clothing, hats, and sunglasses is also recommended.
- Children under six months should avoid direct sunlight; from six months on, use at least SPF 50 sunscreen and take other sun safety measures.
- SPF numbers show how much UVB protection a sunscreen provides; higher SPF means better protection but even SPF 30 lets some UV rays through.
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