Systematic reviewindependent cross-checkabstract checked I-VEG-110 standard review

Meat-only diets: little evidence, real risks

Carnivore Diet: A Scoping Review of the Current Evidence, Potential Benefits and Risks.

Overview

Lietz A et al.. Nutrients 2026 · PMID 41599961 · DOI 10.3390/nu18020348

A 2026 review of 9 small studies found possible short-term benefits but risks of vitamin C, fibre and mineral deficiency and high LDL cholesterol.

Does the study support the specific claim? No · Methodological quality: low

Study explained simply

What did the researchers want to find out?: Map evidence on carnivore diets.
How was the study done?: Scoping review.
How many people, animals or samples were studied?: 9 human studies.
What was actually found?: Short-term benefits reported; deficiency and LDL risks.
How large was the observed effect?: Not quantified.
What do the results mean in everyday life?: Removing plant foods long-term is not recommended.
What are the study's limitations?: Weak primary studies.
What does it say about Elawady's specific claim?: Contradicts the claim of compatibility with good health.
Do the results apply to Germany and Europe?: Applicable.
What can explicitly not be concluded from this study?: Cannot quantify long-term disease risk.

Authors: Lietz A et al.
Journal: Nutrients
Year: 2026
Identifier: PMID 41599961 DOI 10.3390/nu18020348
Verification: verified – PubMed efetch 2026-10-26; Crossref 2026-10-26
Retracted: no
Corrections: none
Extent checked: abstract only
Conflicts of interest and funding: COI statement: The authors declare no conflicts of interest.

What is the current evidence on benefits and risks of the carnivore diet?

Study design: Systematic review – Scoping review (PRISMA-ScR) of human studies on the carnivore diet
Population: Human studies of carnivore diets
Country: Multiple
Period: Databases searched to 2025 (exact date not in abstract)
Sample size: 9 human studies
Inclusion and exclusion criteria: not stated in abstract

Exposure / intervention: Carnivore diet (almost exclusively animal-based)
Comparator: Various/none
Endpoints: Weight, satiety, metabolic and inflammatory markers, nutrient status, lipids
Statistical methods: Narrative scoping synthesis

Results: Individual reports of weight loss, satiety and possible marker improvements; potential deficiencies in vitamins C and D, calcium, magnesium, iodine and dietary fibre; elevated LDL and total cholesterol; one case of health deterioration; evidence quality very limited (small samples, short duration, no controls).
Absolute risks: not reported
Authors' conclusion: The carnivore diet may offer short-term benefits but carries substantial risks of nutrient deficiencies, reduced phytochemical intake and cardiovascular disease; long-term adherence cannot be recommended.

No quantitative synthesis.

Most direct synthesis of plant-food elimination diets; identifies nutrient and lipid risks.

Lennerz 2021 self-reports.

Applicable.

Confirms that no good evidence supports long-term plant-food elimination and that nutrient and lipid risks are plausible.

Multidimensional assessment
Multidimensional assessment
Authenticity of the source	verified
Methodological quality	low
Risk of bias	some concerns
Precision of results	not applicable
Directness	direct
Reproducibility	unknown
Consistency with the overall evidence	consistent
Regional transferability	moderate
Adequacy of the interpretation (by the archive)	not applicable

Controlled long-term trials.