Blueberry powder pilot reports lower depression and anxiety symptoms
The pilot reported lower depression and anxiety symptoms with blueberry powder than placebo and no detected changes in the inflammatory markers measured.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
This pilot study reported reduced depression and anxiety symptoms with blueberry powder compared with placebo in people who had diagnosed disorders. The abstract provides no numerical symptom changes, so the size and practical importance of the difference remain unclear. Blood measurements did not establish an inflammatory explanation for the reported symptom improvements.
The abstract gives no participant count, effect sizes, confidence intervals, or crossover timing details beyond treatment duration. This limits assessment of the pilot's precision and how the crossover comparison was handled.
What researchers found
Depression and anxiety symptoms
Blueberry powder versus placebo after 12 weeks; reported as statistically significant. The abstract provides no effect sizes or confidence intervals.
What the blood tests showed
The authors reported no detected effect on C-reactive protein or measured inflammatory cytokines. Without numerical estimates or uncertainty ranges, that finding does not establish that inflammation was unchanged or explain the symptom results.
The mechanism remains unresolved
Plasma measurements suggested differences in metabolites at intermediate and final timepoints. The abstract does not establish a biochemical pathway explaining the symptom findings, leaving the mechanism behind the reported improvements unresolved.
The original publication
Effects of Blueberry Supplementation on Depression and Anxiety Symptoms in a Rural Louisiana Population.
Venable KE, Kelley DP, Jeansonne A et al.
Nutrients · 2025
- PubMed ID
- 41374012
- Record checked
AI-assisted research and writing. This explains one selected publication; it is not a complete review of everything known. Our approach.
One more question, understood.
Keep track of the research you’ve explored.