Shaped like a brain, and good for one too. We break down the clinical evidence on walnuts and cognitive function.
Why Your Brain Loves Walnuts
Walnuts are the only tree nut with a significant amount of alpha-linolenic acid (ALA), a plant-based omega-3 fatty acid that is a direct precursor to the long-chain omega-3s your brain is largely composed of.
The Cognitive Research
A landmark 2020 randomised controlled trial from UCLA followed 63 participants over 16 weeks. Those consuming 1.5oz of walnuts daily showed measurable improvements in processing speed, memory consolidation, and mood regulation.
Neuroprotection Through Polyphenols
Walnuts contain over 15 distinct polyphenolic compounds, including ellagitannins that are converted by gut bacteria into urolithins — compounds shown to cross the blood-brain barrier and reduce amyloid-beta plaques associated with cognitive decline.
Daily Protocol
The research consistently uses 28–42g (1–1.5oz) as the effective dose — roughly a small handful, consumed as a mid-morning snack or blended into a smoothie.
ProBono Walnuts are sourced from high-altitude Kashmiri farms, hand-selected for size and freshness.