You are what do eat.
Staying upbeat and positive are largely down to your mindset and your perception of the world.
Lest we forget you are a complex being of many interconnecting systems which regulate the many aspects of your being.
Sometimes your physiology can affect your mood, and when that happens a little outside boost can help.
This list of 5 mood boosting foods is a great fallback for those times when you simply CBA
Full article here.