Diets
ketogenic diet does-not-improve systolic blood pressure more than other diets
In plain terms: Is the ketogenic diet the best diet for lowering blood pressure?
Leans support Diets 🔬 Includes disconfirming
Part of: 🥗 ketogenic diet
RefutedContestedStrong support
consensus score 0.30
No — any BP reduction is modest and mostly from weight loss; DASH and intermittent fasting outperform keto for lowering blood pressure.
📅 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
6 support 4 contradict 1 tested null 3 mixed · 14 sources, 10 independent groups
The evidence (14)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Zhao 2026 · Front Nutr | meta-analysis | tested-null | low | Meta-analysis shows DASH significantly improves metabolic-syndrome components including blood pressure, reinforcing DASH over keto. |
| Pescari D et al 2025 · Nutrients | observational | contradicts | low | Non-randomized 12-wk clinic comparison, n=49 adults with obesity: modified KD (n=23, carb <=50 g/d, isocaloric) vs TRE (n=26, 4-10 h window, ad libitum); allocation by voluntary presentation and 'mutual agreement', per-protocol only. Median SBP reduction 8.97% (IQR 3.41, 12.50) on KD vs 1.42% (IQR 0, 2.94) on TRE, between-group Mann-Whitney p<0.001 (Table 3; U=85.0, rank-biserial 0.716, post hoc power only 0.660). Baseline SBP did not differ (122 vs 126 mmHg, p=0.790), but the KD arm started heavier and lost ~3x more weight (BMI -12.71% vs -4.06%), so the SBP gap is confounded with weight loss, not attributable to macronutrient pattern. Internally inconsistent: the Discussion states 'systolic blood pressure, p = 0.10' and that the between-group difference 'did not reach conventional levels of statistical significance', a figure that appears in no table; the Conclusion declines to claim superiority. LDL-C and triglycerides are tabulated at baseline but omitted from the change analysis. |
| Bensaaud 2025 · Cochrane Database Syst Rev | meta-analysis | supports | high | Cochrane review confirms DASH lowers blood pressure, establishing a non-keto diet as the evidence-based BP-lowering pattern. |
| Wang 2024 · Am J Clin Nutr | meta-analysis | mixed | high | Meta-analysis of RCTs found ketogenic diets did not significantly lower systolic or diastolic blood pressure versus control. |
| Schiavo 2022 · Obes Surg | RCT | mixed | low | Low-calorie ketogenic diet did lower systolic/diastolic BP but via weight loss combined with CPAP, not a keto-specific antihypertensive effect. |
| Amini 2024 · Nutr Metab Cardiovasc Dis | meta-analysis | contradicts | moderate | GRADE-assessed meta-analysis of RCTs found the ketogenic diet produced no significant effect on systolic or diastolic blood pressure. |
| Gomez-Perez 2025 · Eur J Prev Cardiol | RCT | mixed | moderate | Sub-analysis of an RCT using 24-h ambulatory BP found ketogenic potential of the diet was not the key driver of BP change among hypocaloric interventions. |
| Lv J, Jiao S, Li W, Ding S, Ma L, Zhang Q 2025 · Front Nutr | meta-analysis | contradicts | low | Network meta-analysis of 26 RCTs / 2,255 MetS patients comparing six dietary patterns plus control. On SBP the KETOGENIC diet ranked FIRST: 'The results of SUCRA ranking were as follows: the ketogenic diet (SUCRA = 95.8%) > DASH diet (SUCRA = 70.8%) > low-carbohydrate diet (SUCRA = 61.2%) > low-fat diet (SUCRA = 56.9%) > Mediterranean diet (SUCRA = 43.6%) > control diet (SUCRA = 17.2%) > vegan diet (SUCRA = 4.4%).' Keto vs control MD = -11.00 (-17.56, -4.44) vs DASH's -5.99 (-10.32, -1.65); keto significantly beat vegan (13.38; 5.25, 21.52) and Mediterranean (8.13; 0.22, 16.04). Authors' own summary: 'With regard to lowering blood pressure and triglyceride levels, the ketogenic diet proved to be the most effective.' WHAT THE HEADLINE n DOES NOT COVER: the ketogenic node for blood pressure rests on ONE trial. Two keto RCTs were included - Volek 2009 (20 vs 20, 12 wk, keto vs low-fat) and Pinsawas 2017 (26 vs 22, 52 wk, keto vs typical Thai control) - and the blood-pressure article list ('Eighteen articles ( 22 , 24 - 28 , 32 , 34 - 37 , 39 - 41 , 43 , 45 - 47 ) reported on blood pressure') excludes Volek (ref 31). So 48 randomised participants in a single Thai trial carry the entire keto BP node, and every keto-vs-other-diet contrast above is INDIRECT via the control node. Keto was NOT significantly better than DASH (5.01; -2.85, 12.87), low-carbohydrate (6.46; -2.33, 15.25) or low-fat (6.89; -0.90, 14.68). Reliability caveats the authors state themselves: 'There remained a possibility of publication bias within the research network'; control diets were heterogeneous and poorly specified; 'Among the 26 studies reviewed, 14 used an energy-restricted design, 8 studies were non-energy-restricted, and 4 studies did not report whether they were energy-restricted', so energy restriction confounds the diet contrast; 5 of 26 trials were at high risk of bias; no GRADE or CINeMA certainty rating is reported. Pinsawas is 52 weeks and therefore falls outside the 12-48-week sensitivity window; what became of the keto BP estimate there is cannot-tell from the available text (Supplementary File 2 is not in the drop). |
| Kazeminasab 2025 · Eur J Clin Nutr | meta-analysis | contradicts | moderate | Hypocaloric low-carb diets did not change blood pressure versus low-fat diets, and very-low-carb reduced flow-mediated dilation. |
| Ge 2020 · BMJ | meta-analysis | supports | high | Network meta-analysis of 14 named diets found blood-pressure advantages largely disappeared by 12 months, with no keto superiority. ⚠️ correction-on-file (Crossref) - kept, corrigendum not retraction |
| Sun 2025 · Sci Rep | meta-analysis | supports | moderate | Network meta-analysis of 21 RCTs: DASH and intermittent fasting best lowered systolic BP, with the ketogenic diet not ranking as a top blood-pressure intervention. |
| Arnotti 2022 · Clin Nutr | meta-analysis | supports | moderate | Increased fruit/vegetable intake lowered blood pressure in overweight/obese adults, supporting plant-forward over keto for BP. |
| Du Y et al 2025 · study_type: RCT | RCT | supports | low | Keto vs low-fat diet RCT, n=60: 'no significant differences in clinical or metabolic outcomes between groups' except ketone levels; keto-arm SBP within-group 131.2->123.1 (p=0.006) but not a between-group comparison |
| Aljuraiban 2024 · Adv Nutr | meta-analysis | supports | moderate | Umbrella review of 341 meta-analyses identifies DASH and Mediterranean patterns (not keto) as recommended for hypertension. |
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