Thoughts of suicide, during psychosis, are physiological manifestations of vitamin-deficit maladies. Happy sentiments about love mean nothing. Beriberi (the vitamin B1 deficiency) fosters melancholia. Pellagra (the vitamin B3 deficiency) fosters melancholia. People contemplating self-****** should be put on B1 & B3. Their blood sugar should be checked, as well as thyroid function.