Reading Barry Groves' diet will make many people shudder.

Nowadays it's certainly unconventional to preach that full fat diet can keep the weight off. It seems to have worked well for the 72-year-old who claims to be as fit as a butcher's dog having lived on 'naughty' food.

Bacon and eggs fried in lard, cocoa with double cream, meat with the fat left on and large wedges of full fat cheese are just some of his daily intake.

Mr Groves, who claims to hold a doctorate in nutritional science, also suggests five fruit and veg a day could kill you.

Interesting. Today, he publishes a book on his eating habits. It's sure to be unpalatable for many.