You might want to ask your doctor about supplementing your traditional treatment with fish oil. In a clinical study Dr. Gogos et al. treated 60 patients with advanced metastatic cancer. One group received a placebo, another a high dose fish oil. The results were spectacular. More clinical studies are needed to confirm these results.
Sugars give a temporary surge but then lead to a rapid fall off of serotonin.
The more you eat, the more you crave. One way to increase serotonin is with 5-HTP, a nutrient derived from protein foods. Recently The Green Turtle Bay Vitamin Co. launched PowerSleep, a vitamin containing serotonin producing nutrients. Low serotonin is also responsible for sleep disorders. You still must eat a well balanced diet, rich in fruits and vegetables, and exercise regularly.