MENTAL ILLNESS:

The rise in mental illnesses such as depression may be the result of a deteriorating diet, a research group has suggested.
Processed foods and intensive farming with pesticides have changed the balance of key nutrients in our foods, and people are also turning away from fresh foods, and instead are eating more saturated fats.
These changes, which have been happening over the past 50 years, are a key reason why there has been a dramatic rise in mental disease, such as depression, memory problems, schizophrenia, Alzheimer's and ADHD.
The body fat of animals we eat is also changing. The study, carried out by the food campaign group Sustain in association with the Mental Health Foundation, reports that chickens are reaching their slaughter weight twice as fast as they did 30 years ago, increasing the fat content from 2 per cent to 22 per cent. Battery farming had also altered the balance of the essential fatty acids omega-3 and omega-6 in the chickens, which the human brain needs for proper functioning.
Saturated fats, by contrast, slow the brain's process, while fish and fresh vegetables can protect against depression, Alzheimer's, and ADHD.