An excerpt from their website:
"This best-selling Inca Tea blend pays homage to the ancient Incan recipe of antioxidant-rich purple corn, berries and spices. The flavors are herbal and fruity. The feeling is like reaching the mountain summit."
I have noticed a significant increase in energy, while consuming this tea. The jury is still out on long-term effects, but so far so good!
Check out the company and all of the other products that they sell here.