The NHS has issued guidance on the correct use of sunscreen, emphasizing that many people make common errors that increase skin cancer risk. According to the health service, sunscreen should be applied twice: 30 minutes before going outside and again just before exposure. This '30-minute rule' is crucial for effective protection.
Why Sunscreen Timing Matters
The NHS explains that sunburn raises the risk of skin cancer and can occur even on cloudy days in the UK. There is no safe way to tan, and a tan does not protect skin from harmful UV rays. The health service stresses that sunscreen must be applied in advance to allow it to bind to the skin.
In a recent Instagram post, the NHS stated: "Sunscreen needs to be applied twice: 30 minutes before going out and just before going out." It also noted that water washes off sunscreen, even water-resistant varieties, so reapplication after swimming is essential.
Reapplication and Expiration
For prolonged sun exposure, the NHS recommends reapplying sunscreen every two hours, or sooner if you have been in water. Expired sunscreen should not be used, as it will not provide effective protection. The NHS warned: "Expired sunscreen won't provide effective protection from the sun."
Consumers are advised to check the label for a sun protection factor (SPF) of at least 30 and a minimum four-star UVA protection rating. UVA protection may also be indicated by a UVA circle symbol. The expiry date is marked by an open jar symbol with a number of months the product lasts after opening.
Additional Sun Safety Tips
The NHS cautions against relying solely on sunscreen. It recommends wearing suitable clothing and seeking shade during the hottest part of the day. "Wear suitable clothing and spend time in the shade when the sun's at its hottest," the NHS said.
These measures are part of the NHS's broader campaign to reduce skin cancer incidence, which is linked to UV exposure. By following the 30-minute rule and reapplying regularly, individuals can significantly lower their risk.
