Diets · Metabolic & Cardiometabolic
carnivore diet increases LDL cholesterol and ApoB
In plain terms: Does a carnivore diet substantially raise LDL cholesterol and ApoB?
Strong support Diets 🔬 Includes disconfirming
Part of: 🥗 carnivore diet
RefutedContestedStrong support
consensus score 0.61
Very-low-carb high-saturated-fat eating raises LDL-C/ApoB in a large subset of people, and a carnivore diet is essentially a maximal version of that pattern, so a substantial LDL rise is expected.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
MechanismIn-vitroAnimalObservationalRCTMeta-analysis
How the studies fall
11 support 0 contradict 4 tested null 5 mixed · 20 sources, 11 independent groups
The evidence (20)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Kris-Etherton 2020 · Am J Clin Nutr | meta-analysis | supports | high | Evidence synthesis affirmed that dietary saturated fat raises LDL cholesterol in controlled feeding studies, the mechanism by which carnivore diets elevate LDL/ApoB. |
| Aronica 2023 · Front Nutr | observational | mixed | low | Secondary analysis of the DIETFITS RCT found the very-low-carb (ketogenic-phase) arm raised LDL cholesterol relative to the low-fat arm. |
| Lennerz 2021 · Curr Dev Nutr | observational | supports | low | Carnivore survey reported self-measured LDL values that were often elevated yet framed favourably by respondents; self-report of labs without standardization is weak and biased evidence. |
| Feng 2025 2025 · Am J Clin Nutr | meta-analysis | supports | moderate | Meta-analysis of carbohydrate-restricted diet RCTs found heterogeneous lipid effects with LDL often rising, especially with animal-fat substitution, supporting the directional claim with caveats. |
| Patikorn 2023 · BMC Medicine | meta-analysis | supports | high | Umbrella review of meta-analyses of ketogenic-diet RCTs reported increases in LDL cholesterol among the consistent adverse lipid signals. |
| Graybeal 2024 · BMC Sports Sci Med Rehabil | RCT | mixed | low | Randomized crossover trial in athletes found a two-week ketogenic (animal-fat) diet raised fasting and postprandial LDL and total cholesterol versus high-carbohydrate diet. |
| Iatan I et al 2024 · JACC Advances | observational | supports | moderate | UK Biobank cohort: 305 low-carbohydrate high-fat (LCHF) diet participants matched 1:4 to 1220 standard-diet controls; LDL-C and ApoB were significantly increased in the LCHF group vs standard diet (p<0.001), with 11.1% vs 6.2% showing sever |
| Zhao (53-RCT MA) 2026 · (MA) | meta-analysis | supports | moderate | Meta-analysis of 53 RCTs found ketogenic (high-fat, animal-food-heavy) diets significantly raised LDL-C (+8.2 mg/dL) and total cholesterol versus control diets. |
| Tindall 2020 · J Nutr | RCT | tested-null | high | Controlled-feeding RCT showed replacing saturated fat with unsaturated fat lowered atherogenic lipoprotein classes, indicating high-saturated-fat animal diets raise them. |
| Budoff MJ et al 2026 · medRxiv | observational | supports | moderate | Prospective cohort of 100 lean-mass hyper-responders (LMHR/near-LMHR, mean BMI 22.5) on ketogenic/carbohydrate-restricted diets; mean LDL-C 242 mg/dL and mean ApoB 180 mg/dL at baseline/follow-up, markedly elevated versus general population |
| Chang 2026 · Endocr Pract | meta-analysis | supports | moderate | Meta-regression of RCTs confirmed ketogenic diets raise LDL-C and total cholesterol in adults, consistent with animal-fat-driven lipid elevation. |
| Tindall 2019 · J Am Heart Assoc | RCT | tested-null | high | Randomized controlled-feeding trial found replacing saturated fat with walnuts/vegetable oils lowered LDL and non-HDL cholesterol. |
| Athinarayanan 2020 · Cardiovasc Diabetol | observational | mixed | moderate | Two-year non-randomised very-low-carb ketogenic intervention in T2D showed a significant rise in LDL-C and large LDL particle number; open-label single-arm design limits causal certainty but the LDL increase is robust and directly relevant. |
| d10-12775-qs-2025-43-61260 2025 · Quality in Sport | observational | supports | low | Narrative literature review of the Lean Mass Hyper-Responder phenotype in individuals on carbohydrate-restrictive diets (ketogenic or carnivore); characterizes the phenotype as LDL-C >200 mg/dL, HDL-C >80 mg/dL, and triglycerides <70 mg/dL. |
| Sun 2025 · Sci Rep | meta-analysis | tested-null | moderate | Network meta-analysis of 21 RCTs identified carbohydrate-restricted diets as strongest lipid modulators, consistent with raised LDL on very-low-carb patterns. |
| Holm 2025 · Vet J | animal | mixed | low | Canine diet trial found a raw meat-based (low-carb, high-animal) diet lowered total cholesterol and LDL versus kibble, a contrasting non-human result flagged for species/design limits. |
| Tian 2024 · Front Nutr | meta-analysis | tested-null | moderate | Meta-analysis of RCTs in overweight/obese T2DM found low-carb diets improved several markers, with lipid effects less uniformly adverse in this population. |
| Anagnostou A et al 2026 · study_type: meta-analysis | meta-analysis | mixed | moderate | Meta-analysis of 18 RCTs (n=905 healthy adults) comparing energy-matched low-carbohydrate vs high-carbohydrate diets; LDL-C fell less (i.e., was comparatively higher) under low-carb than high-carb diets (g=-0.225 favoring HC), while HDL-C a |
| Hengist 2024 · Cell Rep Med | RCT | supports | moderate | Controlled RCT found a ketogenic (animal-fat-rich) diet increased apolipoprotein B and C-reactive protein within 4 weeks, directly supporting an ApoB-raising effect. |
| Hooper L, et al. 2020 · Cochrane Database Syst Rev | meta-analysis | supports | high | Cochrane review established that reducing saturated (largely animal) fat lowers serum cholesterol, implying that a saturated-fat-heavy carnivore diet raises LDL. |
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