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Vitamin B-6 supplementation in elderly men: effects on mood, memory, performance and mental effort J. B. Deijen, E. J. van der Beek, J. F. Orlebeke and H. van den Berg Department of Psychology, Psychophysiology Division, Vrije Universiteit, De Boelelaan 1111, NL-1081 HV Amsterdam, The Netherlands Department of Human Nutrition, TNO Toxicology and Nutrition Institute, Postbus 360, NL-3700 AJ Zeist, The Netherlands Psychopharmacology
Volume 109, Number 4 / December, 199
Abstract This study evaluates
the effects of vitamin B-6 supplementation (20 mg pyridoxine HCL
daily for 3 months) on mood and performance in 38 self-supporting
healthy men, aged between 70–79 years. Effects were compared with 38
controls who received placebo and were matched for age, plasma
pyridoxal-5-phosphate (PLP) concentration and intelligence score.
Before and after drug intervention vitamin B-6 status was
determined, and mood and performance were measured by means of a
computerized testing system. In addition, the phasic pupil response
was measured in order to assess mental effort. Positive effects of
vitamin B-6 supplementation were only found with respect to memory,
especially concerning long-term memory. In view of the finding that
mental performance improvement and PLP values were most
strongly correlated within an intermediate range of PLP, it is
suggested that cognitive effects are primarily associated with a
certain range of vitamin B-6 status increment. The general
conclusion is that vitamin B-6 supplementation improves storage of
information modestly but significantly.
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