There have been many studies of the effects of these different meal patterns and different foods. Some tested and measured subjective things such as fatigue, vigour, anger, hostility, confusion, anxiety and depression. In all of these tests, those who ate carbohydrate-based meals reported worse scores in all classes except anxiety, where there was no difference. In other, objective tests of alertness, auditory and visual reaction times, and vigilance, carbohydrate eaters again came off worse.
Polyunsaturated fats are recommended to lower cholesterol levels. This protocol could also add to the risk of suicide as a 2006 study found that people with a high intake of polyunsaturated vegetable margarines and cooking oils, which were unbalanced with respect to omega-3 fatty acids were more likely to commit suicide.
One of the many studies examining the effects of omega-3 and omega-6 fatty acid levels on suicide and violence reported finding evidence of 'a striking correlation' between the greater consumption of omega-6 linoleic acid from seed oils over the period 1961 to 2000 and the growing number of homicides in the USA, UK, Australia, Canada, and Argentina.
And there may be another dietary aspect. A team from the Medical Research Council, led by Professor David Barker traced suicide rates in 15,500 Hertfordshire men and women whose birth records are available since 1911. They found that men and women who committed suicide had low rates of weight gain in infancy. And that too could be caused by a carbohydrate-rich, nutrient-poor diet.
If your cholesterol is too low — that is below about 4.42 mmol/L (170 mg/dL) your risk of mood disorders, depression, stroke, and violence is increased. During trials to lower levels of cholesterol in the blood, it became obvious that there was a tendency towards more suicides and violent deaths in the treatment groups. In 1991 Canadian investigators examined this trend.
Adjusting for age and sex, they found that those whose cholesterol was below 4.27 were 6 times more likely to attempt suicide that those with cholesterol above 5.77.
This was confirmed by a study conducted at the Psychiatric Clinic, Charles University of Prague.[5] Patients in this study who had attempted a violent suicide had significantly lower cholesterol levels than patients with non-violent attempts and the control subjects. The authors say 'Our findings . . . are consistent with the theory that low levels of cholesterol are associated with increased tendency for impulsive behaviour and aggression and contribute to a more violent pattern of suicidal behaviour.'
They conclude 'These data indicate that low serum total cholesterol level is associated with an increased risk of suicide.'
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