Walnuts

What human studies say about walnuts

• Blood pressure · Randomized controlled trial, 305 participants · 2019
  Office systolic BP changed by -4.61 mm Hg with walnuts versus -0.59 mm Hg in controls (P=0.051); 24-hour ambulatory systolic BP difference was not significant (P=0.111). No diastolic BP changes were observed. Limitation: Only 236 of 305 participants (75%) completed the study, and the main between-group differences did not reach conventional significance. PubMed 30879358
• Weight loss and LDL · Randomized controlled trial, 100 participants · 2017
  Weight loss was similar with walnut-enriched and standard reduced-energy-density diets (-8.9% vs -9.4%). Only the walnut group showed reduced total and LDL cholesterol and a lower systolic BP at 6 months. Limitation: Conducted within a behavioral weight loss intervention, so effects of walnuts alone cannot be separated from the diet and counselling program. PubMed 29202751
• Blood lipids · Randomized crossover trial, 87 participants · 2010
  Compared with a habitual control diet, walnut supplementation was associated with significant changes in total cholesterol (P=0.02) and triglycerides (P=0.03). LDL-C change was nearly significant (P=0.06); HDL-C and LDL:HDL ratio did not change significantly. Limitation: Free-living design without dietary monitoring details in the abstract; LDL-C change did not reach significance. PubMed 20087377

Most studies used extracts or doses that differ from home cooking. Full details in the Nourilo Research Library.