Friday, February 24, 2012

Fasting occasionally could help in keeping Alzheimer's and Parkinson's in check

A new study seems to suggest that regular periods of fasting could help protecting your brain from those degenerative diseases:

Fasting for regular periods could help protect the brain against degenerative illnesses, according to US scientists.

Researchers at the National Institute on Ageing in Baltimore said they had found evidence which shows that periods of stopping virtually all food intake for one or two days a week could protect the brain against some of the worst effects of Alzheimer's, Parkinson's and other ailments.

"Reducing your calorie intake could help your brain, but doing so by cutting your intake of food is not likely to be the best method of triggering this protection. It is likely to be better to go on intermittent bouts of fasting, in which you eat hardly anything at all, and then have periods when you eat as much as you want," said Professor Mark Mattson, head of the institute's laboratory of neurosciences.

[…] Scientists have known for some time that a low-calorie diet is a recipe for longer life. Rats and mice reared on restricted amounts of food increase their lifespan by up to 40%. A similar effect has been noted in humans. But Mattson and his team have taken this notion further. They argue that starving yourself occasionally can stave off not just ill-health and early death but delay the onset of conditions affecting the brain, including strokes. "Our animal experiments clearly suggest this," said Mattson.

[…] The link between reductions in energy intake and the boosting of cell growth in the brain might seem an unlikely one, but Mattson insisted that there were sound evolutionary reasons for believing it to be the case. "When resources became scarce, our ancestors would have had to scrounge for food," said Mattson. "Those whose brains responded best – who remembered where promising sources could be found or recalled how to avoid predators — would have been the ones who got the food. Thus a mechanism linking periods of starvation to neural growth would have evolved."

Interesting findings, although I think it would be hard for any regular worker to fast for one or two days during the week.  I work in an office and I’m sure I’d feel sluggish and irritable, so I can’t imagine how people who do manual labor could do it.

More at The Guardian.

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