Blood and urine levels of which chemicals are related to a history of violent suicide attempts?

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Low amount of serotonin turnover is related to a history of violent suicide attempts. Studies have consistently shown that people who have attempted violent suicide have low levels of serotonin or serotonin metabolites in their blood or cerebrospinal fluid. This suggests that low serotonin activity may be associated with suicidal behavior, particularly violent suicide attempts.

Blood and Urine Levels of Which Chemicals Are Related to a History