Diets · Metabolic & Cardiometabolic
ketogenic diet increases ApoB / LDL particle number
In plain terms: Does the ketogenic diet raise the number of LDL/ApoB particles that carry cholesterol?
Part of: 🥗 ketogenic diet
Often yes, especially in lean people — keto raises LDL cholesterol and LDL particle burden in many, though effect size is highly individual and direct ApoB trial data remain limited.
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)
How the studies fall
The evidence (12)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Feng 2025 2025 · Am J Clin Nutr | meta-analysis | mixed | moderate | Meta-analysis of carbohydrate-restricted diet RCTs found mixed cardiovascular/lipid effects depending on macronutrient replacement and population, cautioning against a uniform ApoB increase. |
| Lee 2021 · Int J Environ Res Public Health | meta-analysis | supports | low | Meta-analysis in athletes found ketogenic diets increased total cholesterol. |
| Chang 2026 · Endocr Pract | meta-analysis | mixed | moderate | Meta-regression of RCTs found the ketogenic diet raises total and LDL cholesterol, modified by baseline BMI and duration. |
| Zhao (53-RCT MA) 2026 · (MA) | meta-analysis | supports | low | Meta-regression of 53 RCTs: KD significantly raised LDL-C (+8.2 mg/dL) and total cholesterol, with low GRADE certainty for LDL-C and no long-term outcome data. |
| Buren J, et al. 2021 · (RCT) | RCT | supports | moderate | Controlled crossover feeding trial: ketogenic LCHF diet raised LDL cholesterol in every healthy normal-weight woman and shifted LDL subfractions, indicating increased LDL particle burden. |
| Kazeminasab 2025 · Eur J Clin Nutr | meta-analysis | supports | moderate | Meta-analysis found low-carb diets raised LDL by ~20 mg/dL versus low-fat diets. |
| Norwitz 2022 · Metabolites | mechanism | mixed | low | The Lipid Energy Model confirms carbohydrate restriction increases VLDL secretion and LDL particle turnover but frames it as physiological (single advocacy network). |
| Dong 2020 · PLoS One | meta-analysis | mixed | moderate | Meta-analysis of low-carb diets found increases in LDL and total cholesterol alongside triglyceride reductions. |
| Soto-Mota A, et al. 2024 · Am J Clin Nutr | meta-analysis | supports | high | Meta-analysis shows low-carb diets markedly raise LDL cholesterol, especially in normal-weight adults. |
| Fechner 2020 · Nutrients | meta-analysis | mixed | moderate | Meta-analysis found the most severe carbohydrate restriction raised LDL/ApoB while milder restriction did not. |
| Budoff M, ... Norwitz NG, et al. (KETO Trial) 2024 · JACC Adv | RCT | supports | moderate | The KETO Trial documented large LDL-C elevations in lean metabolically healthy people on carbohydrate restriction. |
| Joo (normal-weight MA) 2023 · (MA) | meta-analysis | supports | moderate | Meta-analysis found very-low-carb ketogenic diets significantly raised LDL and total cholesterol in normal-weight adults. |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.