Long comment: Malnourished people are not only physically affected, but also mentally. During war times when people do not get enough food, or those in 3rd world countries seem to have lower IQ. In 1st world countries where there is plenty of food, people can still be malnourished because they do not eat the right types of food. All the processed and junk food we eat does not add to nutrition and might even harm our bodies. Anything that affects the body badly is going to affect the brain badly.