Occasionally we come across the pack-a-day smoking granny who tipples vodka on the rocks and is still going strong at the age of 95. Some people successfully defy common health wisdom, while others may be fitness nuts who drop dead at an unreasonably young age.

There’s really no making sense of it except to blame it on genes.

In few people has this been so succinctly illustrated as with the latest genetics jackpot winner to hit the news, Dennis Rosenlof, a 64-year-old man who has consumed at least 12,000 Big Macs in the last 30 years. He eats at McDonald’s every day except Sunday; on Mondays and Wednesdays he eats one, and on Tuesdays, Thursdays, Fridays and Saturdays he eats two per day, accompanied by French fries.

If the diet itself hasn’t killed him already, you’d think the monotony would. But no, in fact he says, "I look forward to going to McDonald's every single time.”

According to Rosenlof, his cholesterol is below 200 and his figure appears svelte. That said, we don’t recommend trying this at home, kids. The nutritional intake for two Big Macs and fries rings in at 96 grams of total fat, 26 grams of saturated fat, and 2470 milligrams of sodium; all of which greatly exceed the American Heart Association's guidelines.

ABC reports on the Big Mac-aholic in the video below:

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Man eats 12,000 Big Macs, is still alive
Dennis Rosenlof has been eating 10 Big Macs a week for 30 years.