Supplements · Metabolic & Cardiometabolic
ground flaxseed decreases LDL cholesterol
In plain terms: Does ground flaxseed lower bad cholesterol?
Yes, in people with high cholesterol, but it must be ground not whole, and may slightly raise it in healthy people.
📅 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)
How the studies fall
What the evidence shows
Ground flaxseed lowers LDL/TC/TG in dyslipidemic subjects (and HbA1c in T2D); paradoxically may raise LDL in healthy subjects. Highly bakeable; must be ground, not whole.
The evidence (16)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Akrami 2018 · J Clin Lipidol | RCT | supports | moderate | RCT in metabolic syndrome: flaxseed oil lowered serum glucose and improved lipid profile vs sunflower oil |
| López-Toledo S et al 2025 · study_type: RCT | RCT | tested-null | low | Parallel RCT in 166 Mexican T2D adults (n=82 intervention/84 control); 16 g/day flaxseed for 3 months significantly decreased total cholesterol and triglycerides (p<0.001) vs control. LDL not separately reported (TC used as lipid endpoint). |
| Sadat Masjedi M et al] # corrected 2026-08-17 from PubMed; was [(SR/MA 14 RCTs) 2022 · (SR/MA) | meta-analysis | supports | moderate | TC/LDL/TG significantly reduced in dyslipidemic (n=1107); LDL rose in healthy subgroup |
| Schoeneck 2021 2021 · Nutr Metab Cardiovasc Dis | meta-analysis | supports | high | umbrella review confirms flaxseed among LDL-lowering foods |
| Musazadeh 2025 · Diabetes Metab Syndr | meta-analysis | mixed | moderate | GRADE MA in diabetics: flaxseed improved weight/waist/TG but LDL not the highlighted endpoint; lipid effects modest |
| Hadi 2020 2020 · Pharmacol Res | meta-analysis | supports | high | 62-RCT dose-response: flaxseed lowers LDL-C, TC, TG |
| Yang 2021 · Nutr Metab (Lond) | meta-analysis | supports | high | Dose-response MA: whole flaxseed (not oil) significantly reduced LDL-C and TC in dyslipidemia-related disease; lignans contribute |
| Mohammadkhani N et al 2025 · study_type: observational | observational | supports | low | Narrative review (2,412 articles screened) of flaxseed's antioxidant/anti-inflammatory effects concludes clinical and animal studies show flaxseed and derivatives exhibit antihyperlipidemic properties, without reporting a specific LDL/TC de |
| Blaszczuk 2022 · Nutrients | meta-analysis | supports | moderate | MA in postmenopausal women: flaxseed lowered TC and LDL-C vs soy/red clover |
| Pan 2009 · Am J Clin Nutr | meta-analysis | supports | high | Landmark MA: whole flaxseed lowered LDL-C (-0.10 mmol/L) and TC; effect stronger in women and hypercholesterolemic subjects |
| Sabet 2024 · Clin Cardiol | meta-analysis | tested-null | low | MA in coronary artery disease: flaxseed supplementation reduced LDL-C, TC and weight |
| Schwingshackl 2018 · J Lipid Res | meta-analysis | supports | high | Network MA of oils/fats: flaxseed/linseed oil ranked favorably for lowering LDL-C among fat sources |
| Jacek 2020 · Nutrients | RCT | tested-null | low | 2-mo low-dose n-3 (flaxseed-fed meat/eggs) RCT: no significant change in plasma cholesterol, LDL or HDL |
| Yin 2023 · Adv Nutr | meta-analysis | contradicts | moderate | ALA MA in overweight/obese: ALA (mainly flaxseed) SIGNIFICANTLY INCREASED LDL-C (+1.32 mg/dL) though cut TG/CRP/SBP |
| Lenártová P et al 2024 · study_type: RCT | RCT | supports | low | RCT in 51 menopausal women given 40 g/day crushed (ground) flaxseed (high- vs low-lignan variety) for 8 weeks vs control; LDL-C significantly decreased in both flaxseed groups, but total cholesterol and HDL-C significantly increased. |
| Mirfatahi 2016 · Iran J Kidney Dis | RCT | supports | moderate | RCT in hemodialysis patients: flaxseed oil reduced LDL-C and triglycerides vs control |
Disagree, or know a study we missed?
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.