Popular fitness YouTuber discovers what nutritional science has been saying all along: eating only meat comes with serious trade-offs.
A recent literature review published in the journal Nutrients examined the carnivore diet’s actual effects, and the findings challenge many claims circulating on social media.
In a detailed video breakdown, Dr. Mike Israetel of RP Strength analyzed both the reported benefits and documented risks of this increasingly popular but scientifically questionable approach to eating.
What he found might surprise carnivore enthusiasts—and concern healthcare providers.
Jump to:
- What Exactly Is The Carnivore Diet?
- The Reported Benefits: What Carnivore Advocates Claim
- The Documented Downsides: Real Problems Carnivore Creates
- What The Research Actually Shows
- Theoretical Long-Term Concerns
- How To Make Carnivore-Style Eating Actually Healthy
- The Optimal Carnivore-Inspired Approach
- Sources
What Exactly Is The Carnivore Diet?
The carnivore diet lacks a formal definition, but centers on consuming exclusively animal-based foods. Some practitioners use it as a short-term elimination protocol to identify food sensitivities, while others adopt it as a permanent lifestyle.
Variations exist across the carnivore spectrum. Some versions include dairy, eggs, or even honey and coffee, while purists stick strictly to meat.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
There’s not like a formal definition, but basically it’s you eat entirely animal foods is kind of the core of the definition.
This inconsistency makes researching outcomes challenging, as participants may be following dramatically different protocols under the same label.
The Reported Benefits: What Carnivore Advocates Claim
Proponents of carnivore eating report a range of positive experiences, though not all stand up to scientific scrutiny.
Rapid Initial Weight Loss
Many carnivore dieters experience dramatic weight drops in the first week. Much of this comes from depleted glycogen stores and associated water loss rather than fat reduction.
When carbohydrate intake stops, muscles can’t replenish glycogen. Each gram of glycogen binds approximately three grams of water, so eliminating carbs creates substantial water weight loss.
Fat loss may follow if calorie intake remains low, which often happens naturally due to food monotony.
Reduced Hunger and Cravings
Higher protein intake and repetitive food choices significantly dampen appetite for many people. The ketosis that results from near-zero carbohydrate consumption may also contribute to reduced hunger signals.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
If your meal today is steak and tomorrow it’s steak and tomorrow it’s steak again, you just kind of can’t really crave steak and if you can’t crave what you’re eating, a lot of cravings go away.
Eliminating hyperpalatable processed foods removes powerful craving triggers entirely. However, this approach works better for “abstainers” than “moderators”—people who do better avoiding trigger foods completely rather than consuming them in moderation.
Simplified Food Decisions
Carnivore eating eliminates decision fatigue around meals. No tracking macros, no recipe hunting, no debates about ingredient acceptability.
The extreme constraint actually creates simplicity that some find liberating, at least initially.
Improved Blood Glucose Control
Some adherents report better glucose management and reduced diabetes medication needs. This makes mechanistic sense—eliminating carbohydrate intake directly reduces blood sugar fluctuations.
However, this benefit could be achieved through many lower-carbohydrate approaches without the extreme restriction carnivore requires.
Reduced Digestive Symptoms
Those who stick with carnivore often report less bloating, gas, reflux, or abdominal pain. This typically occurs when the diet inadvertently removes FODMAPs—fermentable carbohydrates that trigger digestive distress in sensitive individuals.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Eliminating lactose and gluten explains many symptom improvements, though strict carnivores who avoid dairy miss lactose exposure anyway.
The Real Drivers Behind These Benefits
Most carnivore “wins” don’t stem from eating only meat. They result from several powerful dietary changes happening simultaneously:
- Increased protein intake
- Elimination of ultra-processed foods
- Reduced or eliminated alcohol consumption
- Ketosis
- Severe food monotony reducing overall intake
- Weight loss
- Removal of individual food intolerances
It’s not the carnivore part that’s doing it. You could do this with a bunch of different kinds of diets.
Research comparing low-carb diets generally shows early advantages often diminish over time once weight stabilizes.
The Documented Downsides: Real Problems Carnivore Creates
The carnivore diet’s restriction comes with substantial costs, some temporary and others potentially serious.
The Keto Flu and Transition Symptoms
During the first days to weeks, many experience headaches, fatigue, weakness, irritability, brain fog, and poor concentration. Dizziness, low blood pressure, and feeling faint often accompany early water and sodium loss.
While these symptoms typically resolve, they make the initial transition genuinely unpleasant.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Digestive Chaos
Bowel problems plague carnivore dieters from both directions. Some develop constipation, hard stools, and hemorrhoid aggravation from complete fiber elimination.
Others experience the opposite—diarrhea, greasy stools, urgency, or nausea when fat intake rises faster than their digestive system can accommodate.
So, you go to a bunch of fiber and you replace it with a bunch of fat, you’re going to be doing the Hershey squirts, man.
Unpleasant Physical Side Effects
Persistent issues that don’t resolve after adaptation include:
- Bad breath and metallic taste
- Dry mouth
- Altered body odor
- Keto rash
- Food aversion and nausea
- Muscle cramps and palpitations
The monotony eventually creates genuine food aversion. Eating the same proteins repeatedly can make meat itself actively repulsive.
Demolished Athletic Performance
Athletes consistently report reduced sprint ability, interval performance, CrossFit capacity, bodybuilding volume, and sport-specific output. Muscles appear flatter due to depleted glycogen and reduced intramuscular water.
One YouTuber documented his carnivore training experience:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
I felt great. I looked great. Huh. All right, that was a lie. I did look great, but I did not feel great. Even when I was stretching earlier, I already felt sore before the workout even happened, and I could tell instantly I just felt way weaker.
Recovery stalls, and some people lose lean muscle mass when appetite becomes too suppressed to maintain adequate protein intake despite eating primarily protein.
Alarming Cholesterol Changes
Many carnivore dieters experience dramatic LDL cholesterol increases. ApoB—a key marker of cardiovascular risk—also frequently rises substantially.
The same YouTuber received concerning news from his doctor:
Your most recent blood test shows that your bad cholesterol is super high. We highly recommend that you start on a cholesterol medication.
While some markers like triglycerides may improve and HDL may rise, these don’t cancel out the cardiovascular risks posed by elevated LDL-C and apoB. The European Atherosclerosis Society consensus confirms cumulative exposure to apoB-containing particles directly causes atherosclerosis.
Kidney and Joint Problems
Gout flares, rising uric acid, kidney stones, and unwanted urinary changes affect some carnivore dieters. High animal protein creates an acid load while dehydration, low urinary citrate, high sodium, and high purines create multiple kidney stone risk pathways simultaneously.
Social and Psychological Costs
The practical difficulties extend beyond physiology. Many carnivore dieters report:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Social isolation
- Restaurant difficulties
- Family conflicts
- Loss of food enjoyment and flexibility
- Increased food costs
- Travel inconvenience
One dieters’s birthday party experience captured the awkwardness:
The social stuff is annoying. Like I was at a friend’s birthday party and they set aside some unseasoned meat for me.
Traveling becomes particularly challenging. Meat doesn’t travel well, and airplane meals become impossible to navigate.
What The Research Actually Shows
A recent scoping review titled “Carnivore Diet: A Scoping Review of the Current Evidence, Potential Benefits and Risks” analyzed nine studies published between 2021 and 2025.
The limited timeframe reflects how new carnivore eating truly is—it emerged as a phenomenon primarily in the late 2010s and early 2020s.
What The Evidence Includes
The review examined:
- Case reports
- Small case series
- Modeled menus
- One exploratory study
- Two self-selected social media surveys
No randomized controlled trials exist. No prospective long-term cohorts track hard endpoints like heart attacks or cancer.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Key Findings From Diet Modeling
When researchers modeled typical carnivore diets, they found abundant protein, B12, zinc, and selenium—all excellent. However, these diets severely lacked fiber and several micronutrients found primarily or exclusively in plants.
Carnivore was really inconsistently defined. Some versions include dairy, eggs, honey, coffee, alcohol, or even plants.
Heavy liver consumption, promoted by some carnivore advocates, could provide excessive vitamin A. Because vitamin A is fat-soluble and accumulates in the body over time, chronic excess intake creates potential toxicity concerns.
What Participants Reported
Study participants frequently reported weight loss, improved satiety, better self-reported health, and improved metabolic markers—particularly glucose management.
However, LDL cholesterol often rose dramatically, including among previously healthy individuals. Some uncontrolled case reports described disease remission, while others documented gout, kidney stones, and concerning microbiome changes.
The Bottom Line From Researchers
Short-term benefits appear possible, particularly those mediated by weight loss. Long-term safety and efficacy remain completely unknown.
Theoretical Long-Term Concerns
While formal long-term studies don’t exist, existing nutritional science allows reasonable predictions about carnivore’s extended effects.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Cardiovascular Risk
This represents the strongest concern. Most carnivore diets contain extremely high saturated fat, substantially raising LDL-C and apoB.
Improvements in triglycerides and HDL don’t cancel the atherosclerosis pathway triggered by apoB-containing particles. Low triglycerides and high HDL simply don’t offset cumulative LDL exposure’s cardiovascular effects.
Nutrient Deficiencies
While meat is nutrient-dense, muscle meat alone poorly covers:
- Vitamin C
- Folate
- Calcium
- Magnesium
- Potassium
- Iodine
- Vitamin E
- Manganese
- Sometimes thiamine or vitamin D
Turns out that plants have a load of nutrients in them. Guys, I know this sounds crazy, but it’s a real thing.
Simultaneously, frequent liver consumption risks excessive vitamin A and copper, particularly when organ meat supplements make dosing difficult to judge.
The Fiber Problem
Eliminating fiber creates multiple issues. Stool bulk diminishes dramatically. More importantly, fiber serves as the primary substrate for gut bacteria producing butyrate and other short-chain fatty acids crucial for gut health.
Ironically, many carnivore advocates also express concern about gut bacteria health—yet carnivore eating devastates the microbiome that depends on fiber.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Cancer Risk
Processed meat consumption increases colorectal cancer risk. Red meat itself appears technically carcinogenic to some degree. Eliminating fiber-rich foods that help clear the digestive tract amplifies these concerns.
Cooking methods matter significantly. Curing, smoking, charring, or very high-temperature cooking increases exposure to nitrites, heme-related compounds, heterocyclic amines, and other plausible carcinogens.
Direct carnivore-cancer studies don’t exist yet, but theoretical concerns are substantial.
How To Make Carnivore-Style Eating Actually Healthy
For those drawn to carnivore principles but concerned about health and performance, several modifications create dramatically better outcomes.
Emphasize Fresh, Minimally Processed Foods
Minimize bacon, sausage, hot dogs, jerky, and heavily charred meats. Fresh cuts prepared with gentle cooking methods reduce carcinogen exposure.
Diversify Protein Sources
Don’t rely solely on beef. Include:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Fatty fish (salmon, mackerel, sardines)
- Shellfish (shrimp, oysters, mussels)
- Eggs
- Poultry
- Dairy if tolerated (an excellent health food and technically carnivore)
Improve Fat Quality
Seafood provides superior fat profiles. Where possible, allow olive oil, avocado, nuts, and seeds—these consistently outperform butter, tallow, cream, and fatty red meat in health studies.
Allow Low-Carb Plants
This modification creates the biggest health upgrade. Including non-starchy vegetables, berries, avocados, nuts, seeds, and legumes provides abundant micronutrients and crucial fiber.
A diet of mostly meats plus nuts, plus oils, plus veggies is way better for your health than just meats. It’s no contest. It’s still super low carb, but it’s way healthier.
Treat Liver As A Supplement, Not A Staple
Don’t consume unlimited liver. Use it sparingly as a concentrated nutrient source rather than a dietary foundation.
Consider Strategic Carbohydrates For Athletes
If training performance matters, add carbohydrates before and after demanding workouts. Fruit pre- and post-training, combined with meats, nuts, oils, and vegetables at other meals, creates an incredibly healthy and performance-supporting diet.
This approach remains lower-carb while providing enormous benefits over completely carb-free carnivore.
Use Targeted Supplementation
Cover nutrients carnivore doesn’t provide adequately:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Calcium
- Magnesium
- Potassium
- Iodine
- Folate
- Vitamins C, D, and E
- Thiamine
Don’t assume meat covers everything—it objectively doesn’t.
Establish Stop Rules
Certain symptoms should trigger immediate reassessment, not online searches for reassurance:
- Persistent gastrointestinal trouble
- Frequent faintness
- Gout or urinary pain
- Menstrual disruption
- Severe performance loss
- Worsening glucose control
- Substantial LDL-C or apoB rise
Monitor Hydration and Electrolytes
Meat-only eating can suppress thirst responses, leading to accidental dehydration—particularly problematic for athletes.
Get Regular Blood Work
Track cholesterol markers, kidney function, uric acid, and micronutrient status. Don’t ignore concerning results by seeking validation in online forums.
The Optimal Carnivore-Inspired Approach
The carnivore diet can produce short-term benefits for specific individuals, particularly those with severe food intolerances. However, it’s far from an ideal long-term eating pattern.
For those attracted to lower-carbohydrate, animal-focused eating, a modified approach provides all the benefits without the risks:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Variety of meats, especially fatty fish
- Abundant dairy and eggs
- Healthy oils, nuts, and seeds
- Non-starchy vegetables
- Strategic fruit, particularly around training
If you do that diet, I can almost guarantee it’ll be better psychologically, physically, and adherence-wise than the carnivore diet.
This approach delivers superior health outcomes, better athletic performance, greater psychological sustainability, and dramatically improved long-term adherence compared to strict carnivore.
Reducing processed carbohydrates benefits most people. Eliminating all plant foods and fiber does not.
Sources
- Laits et al., “Carnivore Diet: A Scoping Review of the Current Evidence, Potential Benefits and Risks,” Nutrients (2021–2025) – https://www.mdpi.com/2072-6643/17/1/92
- European Atherosclerosis Society Consensus Statement on ApoB and cardiovascular risk – https://academic.oup.com/eurheartj/article/41/24/2313/5735221
