What should you look for when choosing sunscreen?
Summary
The article explains what to look for when choosing a sunscreen. It covers the meaning of SPF numbers, UVA and UVB ratings, and practical advice on applying sunscreen effectively to protect your skin from sun damage.Key Facts
- SPF stands for Sun Protection Factor and indicates how much UVB radiation the sunscreen allows to reach the skin.
- SPF 15 filters about 93% of UVB rays, while SPF 30 filters about 97%.
- UVA rays can age the skin and contribute to skin cancer, while UVB rays cause sunburn and are linked to certain skin cancers.
- Sunscreen should have both a high SPF and a high UVA star rating for better protection.
- Sunscreen should be reapplied every two hours, even if labeled "once-a-day".
- Sunscreens labeled with SPF 50+ give about 98% protection, but no sunscreen provides complete protection.
- It is important to apply sunscreen in adequate amounts to ensure effective protection.
- Sunscreen should not be used past its expiry date as it may be less effective.
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