Diets · Metabolic & Cardiometabolic
plant-based diet decreases LDL cholesterol
In plain terms: Does a low-fat vegan/plant-based diet lower LDL cholesterol?
Part of: 🥗 plant-based diet
Yes — this is one of Barnard's best-supported claims; independent RCT meta-analyses confirm plant-based diets modestly lower LDL and ApoB.
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 (9)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| 2025 venue: J-rel · J-rel | RCT | supports | moderate | Portfolio plant-based diet feeding trials confirm LDL-C lowering via metabolomic biomarkers. |
| Prater 2026 · Am J Clin Nutr | meta-analysis | mixed | moderate | LDL lowering is driven by swapping saturated for unsaturated fat, not veganism per se. |
| Landry 2023 · JAMA Netw Open | RCT | supports | high | Randomized identical-twin trial showed the vegan arm significantly lowered LDL-C versus the omnivorous arm over 8 weeks, controlling for genetics. |
| Chatzi 2024 · Nutrients | meta-analysis | supports | moderate | Umbrella review: plant-based/vegan patterns favorably shift LDL among cardiometabolic-risk adults. |
| Yokoyama 2017 · Nutr Rev | meta-analysis | supports | moderate | Barnard-authored MA: vegetarian diets lowered total and LDL cholesterol. |
| Selinger 2023 · Crit Rev Food Sci Nutr | meta-analysis | supports | high | Independent umbrella review: vegan diets reduced LDL and ApoB (moderate CoE) in high-CVD-risk/diabetes. |
| Durrington 2025 · Antioxidants | mechanism | supports | moderate | Mechanistic review affirms lowering circulating LDL reduces the atherogenic lipoprotein pool available to cross the endothelium, consistent with LDL-lowering being cardioprotective. |
| Rees 2021 · Cochrane Database Syst Rev | meta-analysis | mixed | moderate | Cochrane review of vegan-diet RCTs found reductions in total/LDL cholesterol but evidence graded low-to-moderate certainty with few hard-endpoint trials. |
| Koch 2023 · Eur Heart J | meta-analysis | supports | high | Meta-analysis of 30 RCTs: vegetarian/vegan diets lowered total cholesterol, LDL-C (~-0.30 mmol/L) and ApoB vs comparison diets. |
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.