People who follow the MIND diet may be less likely to experience depression and anxiety, according to an updated systematic review published in BMC Nutrition. The review, led by Zahra Hamidi and Hamed Jafari-Vayghan, pooled evidence from 21 studies that examined how closely people adhered to the Mediterranean-DASH Intervention for Neurodegenerative Delay diet and what that meant for their mental health. The MIND diet was originally designed to protect cognitive function and reduce dementia risk, combining elements of the Mediterranean and DASH diets with an emphasis on food components that may have neuroprotective properties.
The researchers searched the Scopus, PubMed and Web of Science databases from their inception through September 2026, ultimately including 21 studies in the analysis. These studies spanned several designs, including cross-sectional surveys, cohort studies that followed people over time, case-control research and randomized controlled trials. Because the review synthesized findings across different study types, the strength of the conclusions varies by outcome, and the authors note that further large-scale studies are needed to better understand the relationship between dietary patterns and mental health.
The clearest signal emerged for depression. Findings from five cross-sectional and six cohort studies suggested that greater adherence to the MIND diet was associated with a reduced risk of depression. On top of that observational evidence, two randomized controlled trials found that the MIND diet could reduce depressive symptoms. Randomized trials carry more weight than observational studies because participants are assigned to a diet rather than choosing one, which reduces the chance that other lifestyle differences explain the result.
Anxiety showed a similar pattern. One case-control study, two cross-sectional studies and three cohort studies reported an association between adherence to the MIND diet and reduced anxiety. Three randomized controlled trials also reported a beneficial effect of the diet on anxiety, meaning that for this outcome the review captured both observational associations and experimental evidence pointing in the same direction.
Stress told a different story. Among the studies that examined stress, only two of five cross-sectional studies and one of two cohort studies found an inverse association between MIND diet adherence and stress levels. The two randomized controlled trials that investigated this outcome did not demonstrate a beneficial effect. That split suggests the evidence for stress is far weaker than the evidence for depression and anxiety, and the authors of the review do not claim a protective effect for stress.
The MIND diet itself is a hybrid of two well-studied dietary patterns. The Mediterranean diet emphasizes vegetables, fruit, legumes, whole grains, fish and olive oil, while the DASH diet, short for Dietary Approaches to Stop Hypertension, was developed to lower blood pressure through reduced sodium and higher intakes of fruits, vegetables and low-fat dairy. The MIND diet borrows from both but focuses specifically on food components with potential neuroprotective properties, which is why it was created to support cognitive function and reduce dementia risk rather than to target mental health directly.
Why might a brain-focused diet influence mood and anxiety at all? The review’s background section notes that mental health has become a major public health concern, with mental disorders accounting for a substantial proportion of the disease burden across populations. The MIND diet’s emphasis on nutrient-dense plant foods and fish means higher intakes of compounds that researchers have long suspected of supporting brain health, although the included studies measured adherence and outcomes rather than the underlying biology.
It is worth being precise about what the review does and does not show. The observational findings describe associations: people who adhere more closely to the MIND diet reported lower rates of depression and anxiety in cross-sectional and cohort research. Association does not prove that the diet causes better mental health, since people who eat well may also differ in income, education, physical activity or other factors that affect mood. The randomized trials partially address this, and their positive results for depressive symptoms and anxiety strengthen the overall picture, but the review does not report effect sizes or the clinical significance of the changes.
The review also has structural limits typical of systematic reviews. The 21 included studies varied in design, population and how adherence was measured, and the authors did not report subgroup analyses by age, sex or region in the abstract. The conclusion that further large-scale studies are needed reflects the authors’ own assessment that the current evidence base, while suggestive, is not yet definitive for dietary prevention of psychological disorders.
For readers, the practical takeaway is modest but consistent: across 21 studies, the MIND diet was most reliably linked to lower depression risk and, with trial support, reduced anxiety, while the evidence for stress remains inconclusive. The diet was built to protect the aging brain, and this updated review adds mental health to the list of outcomes worth studying further.
Subject of Research: Association between adherence to the MIND diet and mental health outcomes including depression, anxiety and stress
Article Title: Adherence to the mediterranean-DASH intervention for neurodegenerative delay (MIND) diet and its association with mental health: an updated systematic review
Article References: Hamidi, Z., Paknejad, I., Sobhani, S., Saleh-Ghadimi, S., & Jafari-Vayghan, H. (2026). Adherence to the mediterranean-DASH intervention for neurodegenerative delay (MIND) diet and its association with mental health: an updated systematic review. BMC Nutrition. https://doi.org/10.1186/s40795-026-01540-9
Image Credits: AI Generated
DOI: 10.1186/s40795-026-01540-9
Keywords: MIND diet, systematic review, depression, anxiety, stress, mental health, Mediterranean diet, DASH diet, nutrition, randomized controlled trials, cohort studies, BMC Nutrition
News Source: Glenn Wilkins. (November 5, 2026). MIND diet linked to lower depression and anxiety risk in systematic review. Scienmag.
