Some overweight people have trouble breathing. They can stop respiration during the night for a few seconds and then take a gasp.
"The repeated oxygen loss from sleep apnoea may damage other brain structures that regulate memory and thinking," suggests Harper. NewScientist.com
<<Highly processed junk food containing trans-fatty acid>>... "These not only pile on the pounds, but are implicated in a slew of serious mental disorders, from dyslexia and ADHD (attention deficit hyperactivity disorder) to autism."
NewScientist.com
"It seems that some of the damage may be mediated through triglyceride"..."When the researchers gave these rats a drug to bring triglyceride levels down again, the animals' performance on the memory tasks improved."
NewScientist.com
"There's another reason why your brain loves physical exercise: it promotes the growth of new brain cells. Until recently, received wisdom had it that we are born with a full complement of neurons and produce no new ones during our lifetime. Fred Gage from the Salk Institute in La Jolla, California, busted that myth in 2000 when he showed that even adults can grow new brain cells. He also found that exercise is one of the best ways to achieve this."
NewScientist.com