A new study suggests there is confirmation of the physical link in a person's brain to mental illness and suicidal tendencies.

FOX's Colleen Cappon reports in today's "Housecall for Health":

New research may explain why some people become suicidal.  A study from Michigan State University finds mentally ill patients with suicidal thoughts have elevated levels of the brain chemical quinolinic acid, causing inflammation of the central nervous system.

Researchers say this discovery confirms the missing link between inflammation and mental illness.  According to the CDC, there were nearly 37,000 suicide deaths in the U.S. in 2009.

Housecall for Health, I'm Colleen Cappon, FOX News Radio.