In addition to helping maintain a healthy weight, fasting induces ketosis.
Ketone metabolism has been shown to be beneficial for the brain and improve cognition in patients with mild cognitive impairment or Alzheimer disease.
Keep in mind that fasting can come with risks for some people, particularly diabetics, and should be discussed with a healthcare provider.
Source: Bret S. Stetka, MD, July 07, 2015 http://www.medscape.com/viewarticle/847304_9
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