Marlborough's sauvignon blanc grapes may have produced their cheekiest bottle yet. Researchers have found the grape seeds make an excellent sunscreen lotion, to protect the skin from the sun's harmful UV rays. Marlborough produces the bulk of the country's sauvignon grapes - once the wine's been made, there's an abundance of grape seeds left over. New scientific findings show the wine by-product is highly effective at preventing UV rays that harm the skin. "This is a really, really exciting result because this is the first time, this has a protective effect against UV right down at the very protein level," says Dr Jolan Dyer.