Sunscreen used to be viewed as an essential only for beach days – but over recent years it’s become clear that it’s one essential product to incorporate into your skincare routine. But now we’re becoming more clued up on SPF, knowing the difference between mineral and chemical formulas can feel complicated and confusing. Here, experts break down the real differences between mineral and chemical SPF – and what you should pick when it comes to protecting your skin and preventing premature ageing. What’s the difference between mineral and chemical SPF? At their core, mineral and chemical sunscreens work in completely different ways. “Chemical filters work by absorbing UVA and UVB rays so that your skin cells don’t have to,” explains skincare expert and managing director of Ultrasun , Abi Cleeve.…