Fish oils, vitamins, herbs helpful for depression

A number of nutrients, including polyunsaturated fatty acids, St. John's Wort and several B vitamins, have the potential to influence mood by increasing the absorption of chemical messengers in the brain. There is a wealth of epidemiological, experimental and circumstantial evidence to suggest that fish and the oils they contain, in particular omega-3 polyunsaturated fatty acid, are protective against depression.Another candidate for dietary prevention of depression is the amino acid tryptophan. The body converts tryptophan to the neurotransmitter serotonin, suggesting the amino acid may have modest effects on mood.
http://news.yahoo.com/s/nm/20061123/hl_nm/depression_dc