How to increase serotonin in the human brain without drugs (2007)
Interesting review of non-drug approaches to depression and mood:<p>-  Alterations in thought (meditation)<p>-  Exposure to bright light (outdoors)<p>-  Exercise<p>-  tryptophan supplementation taken WITHOUT food for greater uptake<p>-  α-Lactalbumin found in Milk but not really a great option<p>Definitely 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.