But some might question whether those meals of a champion are the healthiest. "I’m one-quarter Coca-Cola," the 84-year-old told Fortune. "If I eat 2,700 calories a day, a quarter of that is Coca-Cola. I drink at least five 12-ounce servings. I do it every day."

His Berkshire Hathaway is also Coke's largest shareholder, owning 9 percent of its shares.

The Oracle of Omaha likes to chomp on Utz potato sticks with his Coke. He says he has spoken to Utz management about possibly buying the company.

Lest you worry that Buffett may be converting to health food, "this morning, I had a bowl of chocolate chip ice cream," he said.

And what's the reasoning behind his diet? "I checked the actuarial tables, and the lowest death rate is among six-year-olds. So I decided to eat like a six-year-old," Buffett said.

Meanwhile, some analysts complain that Berkshire isn't as revealing about its finances as Buffett is about his diet.

"There’s actually a tremendous amount we don’t know about parts of this company," Meyer Shields, an analyst who covers the company for investment bank Keefe, Bruyette & Woods, told Newsweek. "It makes it incredibly difficult to assess the quality of earnings."

Berkshire's profit totaled $4.62 billion in the third quarter, down 8.7 percent from a year earlier.

"You would think that Warren would want to become a standard for transparency, especially after the opaqueness in our banking system in the last cycle and the shrouded secrecy contained in the proliferation of derivatives nearly bankrupted the system," hedge-fund manager Doug Kass, president of Seabreeze Partners Management, told Newsweek.

To be sure, with Berkshire Hathaway shares having soared 30.6 percent over the last year, compared to a 16.9 percent total return with the S&P 500 index, many investors probably don't care.

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