Is once a day enought to prevent ageing?

Let’s face it – slathering ourselves in sunscreen is messy and a bit of a bore. Putting it on our children is even worse – they wriggle and squawk. So what do you do? Apply once a day sun cream, use SPF50 or put the kids in a a plastic boiler suit in a tent on the beach? The answer is …use more than you think you should….and often.  …