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Eating Only Meat for a Month: Research and Testimonials

By Liam McAuliffe Updated on

For most modern people, eating only meat for a month sounds crazy.

Mainstream nutrition tells us that a healthy diet means less meat, more plant-based foods, and a variety of fruits, veggies, and whole grains. 

Yet thousands of people who try eating only meat for a month (and much longer) report dramatic health improvements. 

In this article, we’ll explore the reasons why so many people are choosing to go all-meat for a month, the experiences of high-profile meat-only adopters, and the emerging research supporting their results. 

Table of Contents

Why Are People Eating Only Meat for A Month?

Eating only meat for a month is associated with the broader carnivore diet movement. 

The all-meat way of eating can be viewed as a modern revival of the hyper-carnivorous eating practices that research suggests humans evolved on for over 2 million years.

timeline of human carnivory

Source:  Dr Miki Ben Dor

data from study showing humans and hypercarnivorous apex predators

The idea behind eating only meat for a month is that since our bodies evolved on a carnivorous diet of whole, fresh, fatty meat, returning to this way of eating provides your body with all the essential macro and micronutrients it needs to thrive. 

Nutrient Density

On an animal-based diet, vital nutrients like zinc, heme iron, B vitamins, vitamin A, and the elusive “activator X” vitamin K2, are supplied in abundance, in the most useable “bioavailable” formats, and in near-perfect proportions for your physiological needs. Even nutrients associated with plant foods like potassium and vitamin C are sufficient when eating only fresh meat. 

ribeye steak with nutrient call out

Nutrient Dense Foods list

Compared to meat, plant foods are nutritionally paltry modern inventions. Cultivated plant foods only arrived on the scene after the agricultural revolution around 10,000 years ago. While most fruits, veggies, and grains we eat today are even more recent inventions of the last couple hundred years. 

natural vs cultivated peaches

Source: James Kennedy

Though our bodies can derive some nutrients from cooked plant foods, plants also come with inflammatory and toxic stressors, including: 

  • Thousands of naturally occurring pesticides
  • mineral-leaching antinutrients
  • Irritating fiber
  • Chronically high carb loads


In short, eating only meat for a month means supplying your body with the nutrient-dense foods it is evolved to thrive on. While at the same time, you are eliminating modern “food” inventions associated with chronic inflammation

Diseases of Civilization 

It’s worth noting that chronic inflammatory diseases are the leading cause of death across the modern world. . In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-.”/]

Globally, 3 out of 5 people die from chronic inflammatory diseases, including

  • Stroke
  • cardiovascular disease
  • respiratory diseases
  • heart disorders
  • Cancer
  • Obesity
  • type 2 diabetes
  • various autoimmune disorders
  • mental health epidemics

Interestingly, these diseases are virtually non-existent in hunter-gatherer societies that get the vast majority of their calories from animal products.

collection of cave art of hunters

It’s no surprise that modern chronic inflammatory diseases are directly linked with modern diets and lifestyles. For this reason, they are often referred to as the “diseases of civilization.”

Viewed in this context, eating only meat for a month (or more) is a way to simulate an ancestral diet that can reduce the inflammation underlying most modern diseases.

Carnivore diet benefits web banner template. Zero carb meal, health advantages informative poster. Roasted beef steak on white ceramic plate illustration. Fried pork dish in no vegetables restaurant

Where Did “Eating Only Meat for a Month” Come From? 

Eating only meat for a month gained a lot of attention through the popular podcast the Joe Rogan Experience. 

That’s where Dr. Shawn Baker, author of the bestselling book, The Carnivore Diet, described

his early experience with going all meat for a month as an extension of the ketogenic diet. Baker’s experience inspired Joe Rogan to give it a shot. 

It was also on the podcast that popular psychologist Jordan Peterson shared his and his daughter Mikhaela’s experiences with going carnivore. 

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Dr. Shawn Baker

In his forties, Dr. Shawn Baker, a competitive athlete, began experiencing joint pain and muscle loss. He exercised regularly and ate according to mainstream nutritional guidelines, but his symptoms persisted. 

That’s when Baker began experimenting with high-fat low-carb paleo and then keto. Then, in 2016, Baker experimented with eliminating all plant foods for a week. One week turned into two. He felt good and pushed it to a month. 


Feeling great eating only meat, Baker was curious about what it would be like to go back to keto by adding in greens and dairy. The result was he didn’t feel as good, so he quickly returned to total carnivore. 

Since then, Dr. Baker has started a carnivore diet consulting company, and the rest is history.

Jordan and Mikhaela Peterson

Perhaps the biggest reason for the popularity of eating only meat for a month is psychologist Jordan Peterson

Peterson told Rogan that he credited the carnivore elimination diet for resolving psoriasis, digestive issues, and intractable depression. On the show he said, “I lost 50 pounds. My appetite has probably fallen by 70%. I don’t get blood sugar dysregulation problems. I need way less sleep…my gum disease is gone. Like, what the hell?”

Peterson suggests that you go all meat for at least two months. Granted, after the second month, he recommends adding in low-carb cooked greens. 

Peterson learned about the Lion Diet, from his daughter Mikhaila, who has become a carnivore coach and popular podcaster in her own right. 

Mikhaela credits going all meat with healing depression, anxiety, and numerous physical ailments, including juvenile rheumatoid arthritis. 

Coming full circle, Mikhaela learned about the carnivore diet from Shawn Baker on the Joe Rogan podcast. 

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Joe Rogan

Podcaster, comedian, mixed martial arts aficionado, and mega meat eater Joe Rogan experimented with eating only meat, salt, and water for 30 days. 

He was especially interested in how it could help his autoimmune condition vitiligo

Eating only two meals a day, Rogan’s carnivore diet meal plan included eggs and bacon for breakfast, then grass-fed elk and steak for dinner. 

He was careful to point out that you needed to get plenty of fat because “your body does not want a low-fat diet with low carbohydrates.” In short, a carnivore diet is essentially a version of the ketogenic diet

In a post back in 2020 to his 16 million Instagram followers, Rogan described how eating only meat resulted in stable energy, weight loss, and improved mental health. 

joe rogan in gym talking about carnivore diet

Mainstream Research on Eating Only Meat

These personal reports from influential adopters are interesting, but should we believe them? 

Research out of Harvard University suggests that we should. 

In 2021 Harvard conducted a survey study of 2,029 people eating only meat for at least six months. 

Based on the data, researchers concluded that “Contrary to common expectations, adults consuming a carnivore diet experienced few adverse effects and instead reported health benefits and high satisfaction.”

The study revealed the following results: 

  • 93% improved or resolved obesity and excess weight
  • 93% improved hypertension
  • 98% improved conditions related to diabetes
  • 97% improved gastrointestinal symptoms
  • 96% improved psychiatric symptoms

infographic of harvard study on carnivore diet outcomes

Shawn Baker’s company Revero conducted a survey of its own, collecting feedback from 12,000 people practicing a carnivore diet for at least three months.

  • 96% of participants experienced full or significant improvement in all diseases
  • 95% improved gastrointestinal conditions
  • 96% improved skin allergies and disorders
  • 79% eliminated or reduced medications after 3 months
  • 93% improved mental health and mood disorders
  • 91% lost weight and reduced body fat

Eating Only Meat for a Month: The Bottomline

Eating only meat for a month is also known as the carnivore elimination diet or “Lion Diet.” 

First popularized by Shawn Baker on the Joe Rogan Experience podcast, it was soon picked up and trumpeted by other influential early adopters. 

Now, thousands of people practicing a meat-only diet are reporting dramatic benefits. 

These benefits can be attributed to the fact that ​​animal fats, muscle, and micronutrients provide the foundation of healthy cell structures and hormonal regulation. 

Plant products and carbohydrates are non-essential. And likely cause more harm than good. They expose the body to antigenic stressors, including excess fiber, carbs, and naturally occurring antinutrients and toxins. These plant food factors damage tissues and promote chronic inflammation–the roots of modern diseases.

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