Serotonin is another neurotransmitter that is usually deficient in an addicted brain. This probably accounts for the depressive side of withdrawal symptoms (serotonin receptors in the brain are the target of antidepressant drugs such as Prozac). Serotonin is made from an amino acid called tryptophan, which is found in foods such as meat, brown rice, nuts, fish and milk. Philip Cowen, a psychiatrist at Oxford University, has found that reducing the amount of tryptophan in someone’s diet increases depressive symptoms and also that increasing it can induce a more optimistic outlook.
Brown rice, nuts, fish….Perhaps that’s why I don’t usually feel depress.
For those who would like to be able to wake up earlier, here’s Tim’s advice on how to solve this time inconsistency problem (basic principle applies to diet and other addictions as well).
Isn’t social science wonderful, helping us understand the world and making our lives better at the same time.
Ryu's Blog 
Nice~ you do read everything huh~ =P
Serontonin help regulate sleep and apeptite too~
You are right while the amino acids tryptophan can be found in food, not all ppl have the right neurorecptor to receive it….which might then explain why certain ppl are still more prone for depression no matter what they do or eat…Human body is pretty fascinating…
I don\’t read everything of course, but won\’t miss psychology and health related articles. I wish I\’d be more familar with our body\’s neurotransmitters and aware of their effects on my mood. Wouldn\’t it be interesting to think and speak this way: I feel my epinephrine (adrenaline) level is rising, please don\’t speak to me for now…..What\’s wrong with my serotonin level…..or this activity probably increase my level of dopamine significantly, i should note it down. I guess I\’m beginning to sound weird already, but human body is truely fascinating.