People with high intelligence were less likely to have the genes that predispose people to high blood pressure, to diseases such as Alzheimer's and diabetes.

‘Gene variants that make people intelligent also protect them against disease like Alzheimer's and diabetes.’

People who performed best in memory, verbal reasoning and reaction
tests were less likely to have the genes that predispose people to high blood
pressure, to diseases such as Alzheimer's and diabetes or to poor overall
health. 




When the mental test data was compared with the genome, it was found that some traits linked to disease and thinking skills shared the same genetic influences.
"In addition to there being shared genetic influences between cognitive skills and some physical and mental health states, the study also found that cognitive skills share genetic influences with brain size, body shape and educational attainments," said Ian Deary, University of Edinburgh, UK.
Source-Medindia