A brain chemical related to mood and appetite may also directly affect fat gain, suggests a US study.
They said levels of serotonin, the nerve-signaling chemical targeted by many antidepressants, may also direct the body to put down fat regardless of how much food is eaten.
"It may be one reason diets fail," metabolism expert Kaveh Ashrafi of the University of California, San Francisco, who led the study, said in a telephone interview.
More on it here: http://news.yahoo.com/s/nm/20080603/hl_nm/obesity_eating_dc;_ylt=AlbugmF_k3AiUjiSJAK.iSDVJRIF
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