Vitamin B6 (Pyridoxine) for Cognitive Function

Research suggests that the evidence for vitamin B6 supplementation improving cognitive function in older adults is limited and inconclusive. A 2003 Cochrane systematic review, which identified only two small short-term randomized controlled trials with a combined 109 participants, found no statistically significant cognitive or mood benefits from B6 supplementation, though the trials did confirm that supplementation raised blood B6 levels as expected. Studies indicate that the existing trial base is too small and brief to draw firm conclusions, and reviewers have called for larger, longer trials that include people with actual cognitive impairment. A 2004 review adds a cautionary note, finding that high-dose B6 supplementation carries toxicity risks, underscoring that more research is needed before any strong claims about cognitive benefits can be made.