LifestyleHappy SunshineTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoLifestyle02/14/2013February 14, 2013The adage "Sunshine brings happiness" is certainly true when it comes to the human body. Sunlight triggers the production of the neurotransmitter serotonin. It stimulates circulation and strenghtens the immune system. The result is: we feel better.https://p.dw.com/p/17dlhAdvertisement