The days are getting shorter and less natural vitamin D3 (the happy vitamin) is available via the sun. This all can affect our mood. This is a great documentary video about the reasons so many are depressed these days. It is a story about depression and discusses an important mechanism that emerging research shows may have an interesting relationship with a condition that affects so many. That mechanism is systemic inflammation. The work is done by Rhonda Perciavalle Patrick who has a Ph.D. in biomedical science.