Slim 64-year-old man has eaten 12,000 Big Macs in 30 years

American electrical appliance salesman Dennis Rosenlof has consumed 12,000 Big Macs over the last 30 years. The Vietnam vet eats 10 of the sandwiches a week with only one day of rest -- and he claims to have a clean bill of health.

While we can't verify the state of his arteries, it appears he may have hit the genetic jackpot, at least in one area. Rosenlof is average weight, probably due to the fact that he doesn't eat much else throughout the day, keeping his overall caloric intake low.

"Mondays I always eat a Big Mac, two on Tuesdays, one on Wednesdays, two on Thursdays, one or two on Fridays, and two every Saturday," he explains to ABC.

According to McDonald's, Each Big Mac has 540 calories and 29 grams of fat.

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The problem is that Rosenlof isn't getting the vitamins, minerals and fibre he needs. Yet somehow, he remains blissfully unaware of this medical reality.

"[A Big Mac] has all the major food groups in it," he says. "I'm not sure what's in the special sauce, but you put them all together and it makes a fantastic sandwich."

Sunday is the only day he gives his body a rest, as his wife cooks a family meal.

And it appears Rosenlof is not the only American man with an unhealthy addiction to Big Macs.

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In 2011, ABC reported on a man who by the age of 59 had consumed 25,000 Big Macs.

"I plan on eating Big Macs until I die," Don Gorske told the news network. "I have no intentions of changing. It's my favorite food. Nothing has changed in 39 years. I look forward to it every day."

Gorske claimed to have medical records to prove his clean bill of health. He said a physical from 2011 showed his cholesterol to be low, despite the fact that he exercised minimally.

What are your thoughts on these genetic "winners?" Should they take full advantage of their luck or will their unhealthy lifestyle eventually catch up on them?