Double Whopper - Australia's worst fast foodThe consumer organisation, Choice, named Hungry Jack’s Ultimate Double Whopper as the worst fast food, with a single burger delivering  almost 60 per cent of an adult’s recommended daily kilojoule intake.

Lifehacker, in 2015, confirmed the Choice verdict revealing that the Ultimate Double Whopper comes in at The 4773 kilojoules (that’s 1140 calories, for those who haven’t got their head around the kilojoule thing). Compared to that, McDonald’s most calorie loaded menu option – the Double Quarter Pounder – is relatively benign at 3570 kilojoules (852 calories). That calorie count is made up of 53.3g of fat, 34.2g of carbs, 7g of sugars and 1350mg of sodium.

But how do other fast food options perform in the worst fast food stakes? Lifehacker found that the most calorie-loaded KFC item, the Zinger Stacker Burger, hovered just below the 3000 kJ mark, at 2993 (715 calories). Plough through a 5 Star box that contains various chick options, chips, potato, gravy and a soft drink and you’re looking at more than 7000 kJ (1671 calories) – that’s a whole day’s calorie intake right there.

The big surprise in this worst fast food survey was Subway. You know, the people with the ‘eat fresh’ slogan. If you indulge in a Chicken Parmigiana 12-inch sub, you’re consuming 3640 kilojoules or 870 calories – that’s worse than the Macca’s Double Quarter Pounder and nearly double the calories of a standard Big Mac.

As for pizza – don’t even go there.

The health-threatening food options from these fast food chains pall into insignificance, however, compared to the offerings of the Heart Attack Grill in Las Vegas, USA. This deliberately controversial theme restaurant serves burgers identified as the Single, Double, Triple and Quadruple Bypass versions. The only side order available is fries cooked in lard. Waitresses dress as nurses and diners don hospital gowns before sitting down to eat.

The Quadruple Bypass Burger with 9,982 calories (41,760 kJ) would surely be the world’s worst fast food. It consists of four half-pound beef patties, twenty strips of bacon, eight slices of American cheese, a whole tomato and half an onion served in a bun coated with lard.