How to increase serotonin in the human brain without drugs (2007)
Interesting review of non-drug approaches to depression and mood:-  Alterations in thought (meditation)-  Exposure to bright light (outdoors)-  Exercise-  tryptophan supplementation taken WITHOUT food for greater uptake-  α-Lactalbumin found in Milk but not really a great optionDefinitely can speak to the exposure to light, and exercise ones.  Nothing lifts my mood more than going for a run outside, in the heat of the sun.