Coconut water

http://www.alsearsmd.com/sweet-pure-tropical-water/

Coconut water comes from young, green coconuts, and it’s not just for drinking. It’s also naturally sterile. In tropical countries where coconut trees grow wild, they use a combination of coconut water and coconut oil to heal skin injuries faster. 

Take a drink and you’ll be re-vitalized almost immediately. Within five minutes you’ll feel a burst of energy, have clarity of mind and a sense of well-being. 

One of the reasons is that coconut water can boost thyroid function. Having your thyroid work efficiently is essential for boosting your metabolism and energy production.
Coconut water is also loaded with the electrolyte potassium.