Virtue Yerba Mate is a natural energy drink, which naturally contains zero sugar & zero calories. The South American tea leaf yerba mate is a natural antioxidant powerhouse, with more antioxidants than green tea, essential vitamins & minerals and amino acids. Yerba mate is naturally high in caffeine, with each can containing the same amount of natural caffeine as a cup of coffee (80mg). Every can sold contributes to the conservation of plants, animals and natural communities in the rainforest.