Diseases which may be prevented or cured
by means of therapeutic fasting and caloric restriction
(experimental and clinical evidence:
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Diseases which may be prevented or cured
by means of therapeutic fasting and caloric restriction
memory lost, cognitive decline
Caloric restriction improves memory in elderly humans
Caloric restriction improves memory in elderly humans
Authors: A. V. Witte, M. Fobker, R. Gellner, S. Knecht, A. Flöel
Reducing calorie intake by 30 percent improves memory in elderly individuals, according to research published online Jan. 26 in the Proceedings of the National Academy of Sciences.
To determine whether the observed beneficial effects of diet on cognitive function in animals could be extended to elderly humans, A.V. Witte, and colleagues from the University of Munster in Germany assigned 50 healthy, normal to overweight elderly individuals (mean age 60.5 years, mean body mass index, 28 kg/m2) to one of three groups: a diet containing 30 percent fewer calories; a diet containing a 20 percent increase in unsaturated fatty acids (keeping total fat constant); or no change in diet.
After three months, the researchers found that only caloric restriction was associated with a significant increase (mean, 20 percent) in verbal memory scores. This was correlated with reductions in fasting plasma insulin levels and high sensitive C-reactive protein, with no changes in the levels of brain-derived neurotrophic factor, the author note.
"This interventional trial demonstrates beneficial effects of caloric restriction on memory performance in healthy elderly subjects," Witte and colleagues conclude. "Mechanisms underlying this improvement might include higher synaptic plasticity and stimulation of neurofacilitatory pathways in the brain because of improved insulin sensitivity and reduced inflammatory activity.