I ate like Warren Buffett for a week — and it was miserable

• I ate like Warren Buffett for a week.
• Buffett does not eat very healthy.
• My body felt terrible by the end of the week.
• Follow Markets Insider's coverage of Berkshire Hathaway's annual meeting here.

Warren Buffett is one of the most successful investors in history.

He also has a really weird diet.

Buffett's diet of sugary soda, junk food, and limited vegetables has reached legendary status.

The Berkshire Hathaway CEO drinks about five cans of Coca-Cola products a day, constantly munches on See's Candies, and uses so much salt that John Stumpf, the former Wells Fargo CEO, said it was like a "snowstorm."

Business Insider has tried various people's diets — from Elon Musk's to Tom Brady's — so I decided to take on Buffett's strange food tastes for a work week to see what it was like.

There were some basic ground rules — eat three meals a day, don't drink alcohol, and avoid vegetables.

Overall, I just tried to maintain the general attitude by which the man himself defines his diet.

"I checked the actuarial tables, and the lowest death rate is among 6-year-olds, so I decided to eat like a 6-year-old," Buffett told Fortune. "It's the safest course I can take."

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The cornerstone of the Buffett diet: Cherry Coke.

In 2015, Buffett told Fortune he was "one-quarter Coca-Cola."

Buffett said he favored either Diet Coke or Cherry Coke and had at least five cans of the soda a day.

I decided to opt for exclusively Cherry Coke throughout the week, as I'm not the biggest fan of the taste of plain Coke. I am, however, a fan of cherry and cherry-adjacent soda products like Dr. Pepper and Cheerwine (it's a North Carolina thing — Google it).

I also couldn't purchase cans of the stuff at my local grocery store, but a two-liter works out to 5.6 cans a day, within the ballpark of Buffett's consumption. Thus, I decided to go with one of these each day.

If you're wondering, that works out to 252 grams, or 0.56 pounds, of sugar a day from the Cherry Coke alone. That's right — I got 84% of my recommended daily carbohydrate intake from just the sugar in the Cherry Coke.

I didn't initially do the math on the sugar content of the Cherry Coke, believing it was better to go into the week with a bit of blissful ignorance. While I had assumed it would be rough consuming all of the syrupy-sweet drink, I couldn't anticipate the full devastation the Coke would have on my mood.

On the first breakfast of the week, I was nervous but had a supply of foolish confidence in my ability to handle what was ahead.

In the HBO documentary "Becoming Warren Buffett," the legendary investor said his breakfast each day came from McDonald's and was dictated by the stock market.

Typically, Buffett gets breakfast once the market is open. If stocks are up, he gets a bacon, egg, and cheese biscuit. If they're down, he opts for a cheaper breakfast of two sausage patties. If the market is flat, as it was Monday morning before the open, he goes for the sausage McMuffin.

I get to work around 7:30 a.m. ET every day, meaning I had to base my McDonald's selection on the premarket futures, which tend to be a bit harder to gauge. Regardless, I decided to try to factor in a bit of qualitative analysis based on the overseas markets and the previous day's close (and, by the end of the week, what I could tolerate).

The first breakfast wasn't too challenging. The biggest issue was the lack of coffee, as Buffett doesn't drink the stuff.

I decided to front-load the Cherry Coke to get the caffeine I usually got from my coffee while also preventing myself from drinking soda well into the night.

Additionally, I'd decided to keep track of my weight each morning and night. For the calorie counts, the Cherry Coke totals are added to the count at dinner, since they were dispersed throughout the day.

Breakfast, Day 1: McDonald's sausage, egg, and cheese McMuffin; Cherry Coke

Breakfast calories: 470

Monday-morning weight: 168.4 pounds

The Cherry Coke hit me like a ton of bricks.

I don't drink much soda — I drink mostly water and coffee at work — so the sudden increase in the amount of corn syrup in my diet made me feel incredibly sluggish. Plus, the sugar high was so off the charts that I almost felt the tingle of the carbonation in my fingers as I was typing.

Then again, I also put down half of the two-liter before 11 a.m. in an attempt to front-load the caffeine.