Carnivore Diet: A Review ★★☆☆☆

By R.Davies, PhD・Diet Atlas
Published May 05, 2026 | 3 min read

The carnivore diet is a low-carbohydrate diet that eliminates all plant foods and consists exclusively of animal products (e.g., meat, fish, eggs, and sometimes limited dairy). Proponents of the diet claim it addresses various health issues (like inflammatory, digestive, and metabolic conditions) by removing certain plant compounds they consider problematic; fibre, lectins, phytates, and oxalates are commonly cited examples.

The diet's core principle is a simple, meat-only eating pattern. Vegetables, fruits, grains, legumes, nuts, seeds, and plant-based oils are banned. Followers typically eat beef, pork, poultry, fish, and eggs as their staples, with some people including organ meats for specific nutrients. 

Water and occasionally bone broth serve as primary fluids, while coffee and tea are included in some forms of the diet (but not others). Unlike other low-carbohydrate diets that allow some vegetables, the carnivore diet maintains zero (or near-zero) carbohydrates. So, like other very low-carbohydrate diets, it induces a metabolic state of ‘ketosis’, where the body uses fat (and ketones) for fuel instead of carbohydrates.

Pros

Current evidence for the benefits of the carnivore diet is taken from self-reported survey data rather than clinical research. Therefore, reported benefits should be treated with caution. People who follow the diet have reported high satisfaction levels and perceived improvements in their bodyweight, health and well-being. 

People with diabetes have reported health improvements, with some noting decreases in medication use. People with bowel conditions also reported improvements in their gut function when following the diet.

The reported weight loss people experience (who are already overweight or obese) probably comes from the diet’s high-protein content and complete elimination of junk foods and sugar. The diet's simplicity may appeal to those of us who get overwhelmed by overly complex dietary guidelines. Its restrictive nature might be easier to follow for people who like clear rules and boundaries.

Cons

The carnivore diet presents several concerns that limit its appeal. The elimination of all plant foods raises issues around the adequacy of certain nutrients (e.g., vitamin C, folate, pyridoxine, fibre, calcium, and magnesium). Another potential worry is the lack of diversity of food, which is important for a healthy gut “microbiome”. A low diversity of the bacteria in your gut is associated with inflammation, obesity, gut, immune and mental health issues.

There’s also some debate around whether the high intake of animal (saturated) fat, with some studies reporting increases in the “bad” LDL cholesterol, which increases cardiovascular disease risk. The low fibre intake has been flagged as an issue for your gut health, and the high protein intake can possibly affect bone health and the function of some of your internal organs.

The restrictive nature of the diet also creates practical, social, and ‘psychological’ challenges. This includes the high cost of the high-quality animal foods, the limited variety and availability of them, and the potential affect social eating or dining out. While motivated people report high short-term adherence to the diet, the real-world sustainability of the diet for most people is questionable.

Bottom Line

The carnivore diet represents one of the most restrictive and unproven diets out there for improving your health and body weight. While there’s some data suggesting some people experience short-term satisfaction and perceived health benefits, the evidence is weak. There are also concerns about the nutritional adequacy of the diet, the cardiovascular risks and the unknown long-term safety of it.

Sources

Cassady BA et al. Effects of low carbohydrate diets high in red meats or poultry, fish and shellfish on plasma lipids and weight loss. Nutr Metab (Lond). 2007 Oct 31;4:23. PMID: 17974023

Goedeke S et al. Assessing the Nutrient Composition of a Carnivore Diet: A Case Study Model. Nutrients. 2024 Dec 31;17(1):140. PMID: 39796574

Houttu V et al. Severe Dyslipidemia Mimicking Familial Hypercholesterolemia Induced by High-Fat, Low-Carbohydrate Diets: A Critical Review. Nutrients. 2023 Feb 15;15(4):962. PMID: 36839320

Lennerz BS, Mey JT, Henn OH, Ludwig DS. Behavioral Characteristics and Self-Reported Health Status among 2029 Adults Consuming a "Carnivore Diet". Curr Dev Nutr. 2021 Nov 2;5(12):nzab133. PMID: 34934897

Norwitz NG, Soto-Mota A. Case report: Carnivore-ketogenic diet for the treatment of inflammatory bowel disease: a case series of 10 patients. Front Nutr. 2024 Sep 2;11:1467475. PMID: 39296504

O'Hearn A. Can a carnivore diet provide all essential nutrients? Curr Opin Endocrinol Diabetes Obes. 2020 Oct;27(5):312-316. PMID: 32833688

Wang Y et al. Meat Consumption and Gut Microbiota: a Scoping Review of Literature and Systematic Review of Randomized Controlled Trials in Adults. Adv Nutr. 2023 Mar;14(2):215-237. PMID: 36822879

Further Reading

High Protein Diet: A Review

Ketogenic Diet: A Review

Atkins Diet: A Review

Published: May 05, 2026

Lead Author: R.Davies, PhD, MRes, BSc, CPT, FHEA | Author Bio
Dr Davies is a physiologist specialising in human health, performance and nutrition.

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