Here's What Happened When a Doctor Tried the Whole30 Challenge (2024)

It was rough.

By Katie Dupere
Here's What Happened When a Doctor Tried the Whole30 Challenge (1)

You’ve probably heard of — or tried — the Whole30 diet. The elimination diet seriously restricts your food intake for 30 days with the goal of identifying food sensitivities and poor nutritional choices. Even with so much buzz around the diet, there is still one major thing health professionals and the general public can’t seem to agree on: Is this diet actually any good for you? Enter: Doctor Mike’s Whole30 experiment.

Doctor Mike, the internet celebrity doctor who gained popularity for his combination of smarts and good looks, recently took on the Whole30 challenge and documented the results on YouTube. His experience and professional thoughts might make you rethink the diet.

Doctor Mike is known for not endorsing elimination diets, of which Whole30 definitely is. He says in the video that they can fuel eating disorders and possibly lead to nutritional deficiencies by cutting out food that likely isn’t the cause of any problems.

Whole30 has some intense restrictive rules: no added sugar, no grains, no legumes, no dairy, no alcohol, no MSG or sulfites, and no junk food.

“I can cut out bread. That’s no problem I’ve done that before when I was gluten-sensitive in the past,” Doctor Mike says in the video. “But the fact that I had to give up brown rice, quinoa, things that I eat as part of a healthy diet…Why would you eliminate some foods like black beans that can be so healthy to the majority of people?”

The doctor is clearly not impressed — and that’s not the end of his problems with Whole30.

"Why would you eliminate some foods like black beans that can be so healthy to the majority of people?"

Doctor Mike happened to take on the challenge during Thanksgiving and the beginning of the Christmas holiday season, which made the rules even more difficult to follow. At Thanksgiving, Doctor Mike reports he could only eat turkey and peas. That’s it.

Aside from the elimination struggles, Doctor Mike also began to struggle in the gym. He says he noticed his bench starting to go down almost immediately.

“Normally when I’m working out, I’m benching 225 to 255 — 255 was becoming a huge challenge for me,” Doctor Mike says in the video. “When I stepped on to the basketball court, after one game, I felt like I was exhausted.”

Doctor Mike says this sluggish performance was probably due to underrating his usual caloric intake, which is something that just naturally happened on the diet.

“When you do an elimination diet like Whole30, it’s very easy to under eat calories,” Doctor Mike says. “This is probably why a lot of people lose weight.”

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Here's What Happened When a Doctor Tried the Whole30 Challenge (3)

Once he hit day 30, he started to reintroduce foods to note their potential negative impacts, which is the main point of the diet. But Doctor Mike says this is one of the things he dislikes most about Whole30, saying the time frame of adding back in foods is not enough to properly track their individual impact on the body.

“It’s not really scientific,” he says. “If you put in legumes on the first day, then two days later add in sugars, then two days after that grains, it’s not scientific. If we’re doing a proper elimination challenge in the medical setting, we do a 90-day elimination.”

Doctor Mike also reports his digestive system, took a hit during Whole30, leading to bloating and dirreahea. After reintroducing foods, he reports his body returned back to normal.

Overall, Doctor Mike wasn’t impressed with Whole30, though he did admit there was something reward to following such restrictive rules successfully. While the competitive crowd might agree, the doctor says Whole30 is probably not a good idea.

“At the end of the day, nutritional advice should be individualized," he says. "It’s a very restrictive diet, and it can cause some serious problems. There’s definitely some research showing that there’s some crossover with eating disorders. Most of the time, [Whole30] is unnecessary.”

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Here's What Happened When a Doctor Tried the Whole30 Challenge (2024)

FAQs

What do doctors think about Whole30? ›

“At the end of the day, nutritional advice should be individualized," he says. "It's a very restrictive diet, and it can cause some serious problems. There's definitely some research showing that there's some crossover with eating disorders. Most of the time, [Whole30] is unnecessary.”

What is the hardest day of Whole30? ›

On Days 10 and 11, you are statistically the most likely to quit your Whole30. (That's why they're “the hardest days.”) By this point, the newness of the program has worn off, and though you've made it through most of the unpleasant physical milestones, you've yet to experience significant benefits.

What is the dark side of Whole30? ›

The Whole30 diet is cutting dairy, alcohol, legumes, added sugars, and processed foods for 30 days. Potential risks include constipation and an inability to keep off weight lost while following it. The diet may also be expensive to follow, as it can involve buying a lot of meat and fresh produce.

What is the Whole30 challenge for weight loss? ›

The Whole30 diet is a strict 30-day elimination diet that many people turn to for weight loss or help with digestive concerns. The program encourages you to cut out alcohol, sugar, grains, legumes, dairy, and additives from your diet for 30 days. It is advertised as a total lifestyle change, rather than a simple diet.

Is Whole30 scientifically proven? ›

In addition, there is no evidence-based research to support any of the health claims made by the Whole30 diet. Rather than eliminating foods completely, consider making gradual lifestyle changes, such as cutting back on calorie-dense foods and sugar-sweetened beverages.

Why do I feel worse on Whole30? ›

Some downsides include Whole30 side effects like digestive problems, worsened food cravings, and reduced nutrient intake. The diet restricts certain foods and food groups, which, if followed long-term, can result in nutrient deficiencies.

Why do your pants get tighter on Whole30? ›

Sure enough, I was up 2.6lbs “overnight.” It's water retention and the beginning of the infamous “my pants are tighter” phase of Whole30 as the body continues expelling all the junk and getting used to a new way of eating. Day 8ish is usually a bit of a digestive adventure, so we'll see where things go.

Has anyone lost weight on Whole30? ›

Whole30 has gained a reputation as an effective program for weight loss and overall health improvement. Many individuals have reported successful weight loss outcomes while following the Whole30 guidelines.

Does Whole30 reset your metabolism? ›

“As well, you're not supposed to weigh yourself or take any measurements during the 30 days.” The idea behind this approach is to reset your metabolism and digestive tract. According to some research studies, elimination diets like Whole30 can be an effective tool to help some people with gastrointestinal issues.

Are potatoes ok on Whole30? ›

Yes, you can eat potatoes of all colors under the new Whole30 guidelines, white varieties included. Mash 'em up, roast them, or throw them in the skillet to enjoy. Just don't eat them commercially deep-fried or in packaged chip form to stay Whole30-compliant.

What is the one bite rule on Whole30? ›

I encourage you to read the whole post (and the experience that prompted it), but I'll summarize it here: If you get one bite into a less healthy treat and realize it's not worth it, stop eating.

Why am I pooping so much on Whole30? ›

Your 1-Day Healthy Whole30 Meal Plan

You might experience headaches, bloating, stomachaches, sugar cravings, and — yes — diarrhea. This is likely the result of all the fiber you're taking in through fruits and vegetables, and it's especially likely to happen if you didn't eat a lot of fiber before.

Is oatmeal Whole30? ›

Since yogurt, cereal, toast, and even oatmeal are off the table, breakfast tends to be the toughest meal on the program. A few of us here at Greatist HQ completed the Whole30, so we can attest to that. Eggs get old — fast.

What are the withdrawal symptoms of Whole30? ›

Normal. Sorry.
  • Headaches (dull)
  • Lethargy.
  • Sleepiness.
  • Crankiness.
  • Brain fog.
  • Cravings.
  • General malaise.
  • Breakouts.

Is almond milk allowed on Whole30? ›

It's got only four ingredients: water, organic almonds, organic acacia gum, and sea salt. You've seen this in literally every grocery store, and now you know: Yes, you can drink it while doing Whole30. Silk's unsweetened vanilla carton is fair game, too.

Why is Whole30 so restrictive? ›

Some foods eliminated during the Whole30 (like dairy, wheat, peanuts, and soy) are four of the top eight food allergens. Other food groups are eliminated due to the potential impact they might have on your cravings, metabolic health, digestive system, and immune system.

Does Whole30 heal your gut? ›

The Whole30 is an excellent way to help heal your gut since the foundation of the program is pure whole foods. In addition, there are several gut healing foods and supplements known for their ability to improve digestive health that you may wish to consider.

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