Metabolic & Cardiometabolic
saturated fat decreases lipoprotein(a)
In plain terms: Does eating more saturated fat lower your Lp(a), and does a low-fat DASH diet raise it?
Part of: 🔍 Saturated fat
Yes within trials: lowering saturated fat reliably nudges Lp(a) up (DASH-style feeding raised it ~30%), an effect driven mainly when carbs or trans fats replace the fat, while swapping in unsaturated oils leaves Lp(a) roughly unchanged.
📅 Last reviewed: 2026-07-14 ⓘ
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
Within controlled feeding trials this is reliable and counterintuitive: cutting saturated fat raises lipoprotein(a). GET-READI moved median Lp(a) from 44 to 58 mg/dL on a DASH-style diet, and 27 randomised trials pool in the same direction. The rise is specific to the replacement — unsaturated oils lowered Lp(a) slightly — and its clinical meaning is unknown.
The evidence (7)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Enkhmaa B, Petersen KS, Kris-Etherton PM, Berglund L 2020 · Nutrients | observational | mixed | low | Review of 7 trials finds replacing saturated fat with carbohydrate or unsaturated fat inconsistently raises Lp(a) even as it lowers LDL-C, a divergent but heterogeneous effect. |
| Jang Y, Lee JH, Lee SG, Choe HJ, Park SM, Jeong IK, Kim BJ, Lipoprotein(a) Task Force of the Korea Society of Lipid and Atherosclerosis 2026 · J Lipid Atheroscler | observational | mixed | moderate | Position paper, not evidence: 'This Korean position paper, developed by the Lp(a) Task Force of the Korean Society of Lipid and Atherosclerosis, presents an evidence-based summary'. States Lp(a) is 'largely unaffected by lifestyle modification or conventional lipid-lowering therapy'; no saturated-fat estimate. Review — zero weight. |
| Myagmarsuren M, Law HG, Zhang W, Anuurad T, Bang H, Bishop LM, Shen T, Fiehn O, Petersen KS, Berglund L, Enkhmaa B 2025 · Nutrients | RCT | supports | moderate | DELTA-1 & DELTA-2 controlled feeding trials: SFA reduction again raised plasma Lp(a) levels and shifted Lp(a) lipid composition (replication in two more cohorts). |
| Nuotio P, Lankinen MA, Meuronen T, de Mello VD, Sallinen T, Virtanen KA, Pihlajamäki J, Laakso M, Schwab U 2024 · Atherosclerosis | RCT | mixed | moderate | In 118 men, ALA and LA unsaturated-oil diets modestly LOWERED Lp(a) (-7 to -9%); shows the Lp(a) rise is specific to carb/transfat replacement, not all low-SFA diets. |
| Tindall AM, Kris-Etherton PM, Petersen KS 2020 · J Nutr | observational | contradicts | low | [FT-verified] Tindall 2020 controlled-feeding crossover (n=34, at CVD risk; NCT01235832): SFA cut from 12% (run-in) to 7% kcal on all three 6-wk diets. 'The present study showed no change in Lp(a) and no evidence of a tendency toward increased concentration; after the WFMD, Lp(a) was modestly decreased compared with baseline' (Lp(a) 5.2 run-in vs 4.8/4.6/5.0 mg/dL, diet P = 0.2). Reducing SFA did not raise Lp(a) = contradicts the directional claim. Graded observational: SFA was identical across randomised arms, so the SFA contrast is the non-randomised run-in comparison. Low baseline Lp(a), exploratory outcome, California Walnut Commission funding. |
| Law HG, Khan MA, Zhang W, Bang H, Rood J, Most M, Lefevre M, Berglund L, Enkhmaa B 2023 · J Lipid Research | RCT | supports | high | GET-READI crossover, 166 African Americans: cutting SFA 16%->6% (DASH) raised median Lp(a) 44->58 mg/dl (P<0.0001) while lowering LDL-C. |
| Riley TM, Sapp PA, Kris-Etherton PM, Petersen KS 2024 · Am J Clin Nutr | meta-analysis | supports | high | Meta of 27 RCTs/1,325: lower-SFA diets raised Lp(a) (SMD0.14); effect significant when SFA replaced by carbs or trans fat, null for MUFA/PUFA swaps. |
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.