What do walnuts do to your belly and health in a month?
Benefits of Short-Term (4-Week) Daily Walnut Consumption in Middle-Aged Adults at Risk for Metabolic Syndrome: Outcomes of a Randomized Controlled Trial
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Walnut consumption reduced waist circumference but didn’t improve any blood-based health markers.
Walnuts are widely believed to improve heart health, cholesterol, and inflammation. Yet despite strong biological plausibility and prior epidemiological support, this trial found no such benefits in just four weeks.
Practical Takeaways
Try adding a small handful of walnuts to your daily diet if you want to see a slight reduction in belly size over a few weeks.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Walnut consumption reduced waist circumference but didn’t improve any blood-based health markers.
Walnuts are widely believed to improve heart health, cholesterol, and inflammation. Yet despite strong biological plausibility and prior epidemiological support, this trial found no such benefits in just four weeks.
Practical Takeaways
Try adding a small handful of walnuts to your daily diet if you want to see a slight reduction in belly size over a few weeks.
Publication
Journal
Nutrients
Year
2025
Authors
Letiția Mateș, Doina Albert-Ani, Ionel Fizeșan, Andreea-Elena Petru, Roxana Banc, Marius Emil Rusu, C. Costache, Lorena Filip, D. Popa, D. Leucuța
Related Content
Claims (5)
Eating walnuts might help lower body-wide inflammation and make your blood vessels work better by relaxing more easily.
Eating a small handful of walnuts every day for a month might help shrink your waist a little bit if you're a middle-aged white adult at risk for metabolic problems and not on medication.
Eating 45 grams of walnuts every day for a month doesn’t seem to change a specific marker in the blood linked to blood vessel inflammation — at least in middle-aged white adults who are at risk for metabolic syndrome.
Eating a handful of walnuts every day for a month doesn't seem to help improve cholesterol or other blood fats in middle-aged white adults who are at risk for metabolic syndrome.
Eating 45 grams of walnuts every day for a month doesn’t seem to change blood sugar levels in middle-aged white adults who are at risk for metabolic problems, though there was a slight hint of blood sugar going up — but not enough to be sure.