The British Association of Dermatologists (BAD) says frequent reapplication of sun cream is important, regardless of how long any product claims to give protection for. People can still use these types of sunscreens, but you should treat them like any other sunscreen, and reapply regularly,' he said. Apply a generous amount of sun cream - around one teaspoon per body part - at least 15 minutes before you go into the sun so it soaks in. In 2016 Which? put several once-a-day sunscreens to the test, investigating how long they lasted on volunteers in a controlled lab experiment, and found they didn't offer nearly as much protection as claimed.

Nobody applies sunscreen perfectly uniformly to all exposed skin and it is inevitable that we will miss patches of skin. Reapply sunscreen after swimming, sweating heavily, towel drying, or rubbing your skin in a way that might cause the cream to rub off. For over 70 years, PIZ BUIN ® has been providing sun lovers everywhere with suncare solutions that help them achieve the perfect balance between getting a beautiful tan and the protection they need. In fact, PIZ BUIN ® was one of the first to make tanning safer by implementing the Sun Protection Factor (SPF) system in the 1960s. So wherever there’s sun, whether it’s at the beach, on a mountain or in the city, PIZ BUIN ® has been there helping people to enjoy life in the sun, safely. Don't just rely on sunscreen either: use clothing, hats, sunglasses to cover up, and seek shade, particularly when the sun is strongest, between 11am and 3pm - regardless of whether you are wearing sun cream. A spokesperson said: 'Soltan Once products clearly state how they should be used and when to reapply. We are confident in the claims for the Soltan Once range and refute the suggestion that they are misleading.We made multiple attempts to get in touch with Calypso, but the brand did not respond to any of our questions or send us a comment. Riemann The regular reapplication advocated by most sunscreens protects us against this,’ he says. To apply sun cream properly you should: Over the course of a day, he added, 'swimming, drying, sweating, getting dressed and undressed' can cause sun cream to be wiped or washed away.

Since our 2016 investigation, the CTPA has advised brands to voluntarily stop making 'once a day' claims and move towards using the word 'durable' instead. A spokesperson added: 'As with all sunscreens, it is important to follow the instructions for application and use; and sunscreen should not be used to intentionally stay longer in the sun. Sunscreen is just one part of a sun safe regime.' Boots Casting incorrect assertions in this manner is misleading and confusing to customers and we are disappointed that Which? has chosen to do this.' Calypso It's clear that there are plenty of conditions to fulfil to get the claimed protection from once-a-day products, which may be hard to achieve if you're on a day out in the sun.We asked Boots a series of questions about its Once sun cream range and asked it to respond to our concerns about 'once a day' claims.