Sunscreen labels carry two ratings that mean different things. This page summarises the NHS guidance on how to read them and how much to use. It is general information, not medical advice.
Reading the label
- SPF measures protection from UVB, on a scale of 2 to 50+. The NHS says to look for an SPF of at least 30.
- The star rating measures UVA protection. UK sunscreens go up to 5 stars, and the NHS says to look for at least 4.
- Products covering both UVA and UVB are sometimes called broad spectrum.
How much and how often
- An adult covering the whole body should use roughly 6 to 8 teaspoons. Applying too little reduces the protection you get.
- If you will be out long enough to risk burning, apply sunscreen 30 minutes before going out and again just before.
- Reapply about every 2 hours, because the sun can dry it off the skin, and always after swimming, towel drying or sweating, or if it may have rubbed off.
Sunscreen is not the only protection
In the UK, the NHS advises spending time in the shade between 11am and 3pm from March to October, and checking the UV index: at 3 or higher, consider protecting your skin. Clothing, a hat and sunglasses also help.
Babies and children
Babies under 6 months should be kept out of direct sunlight. From March to October children should cover up, stay in the shade and wear at least SPF 30 sunscreen. If a product irritates your skin or you have a skin condition, ask a pharmacist or GP.
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