Researchers at Columbia University who have collected brain samples from suicide victims, which they have dissected and analyzed for chemical and genetic abnormalities, state: "The serotonin system in the brain of suicide victims is defective. In very serious cases no amount of Prozac can save them." Cheng Tai-ann has studied the suicide phenomenon in Taiwan for more than 20 years.
美國哥倫比亞大學研究人員曾蒐集了自殺者的腦部標本，進行神經解剖、化學變化與基因研究，他們相信，「自殺者腦中的血清素系統有缺陷，問題嚴重到可能連百憂解也救不了他們。」