Michael Mosley, author of the 5:2 diet and the "Clever Guts Diet," spoke to Business Insider UK and explained why a healthy diet is much more important than exercise when it comes to losing weight.

Business Insider UK spoke with Michael Mosley, author of "The clever guts diet" and the popular "5:2 Diet Book," who explained why the benefits of eating an apple far outweigh drinking apple juice.

These days, we're always on the lookout for clever tricks to get the most out ... pie -- there's a part you probably overlook: the guts. All those stringy, wet strands that come out of the middle ...