Yerba Mate is a strong caffeinated tea that is sourced from he jungles ad pampas of Argentina, Brazil and Uruguay. It is an excellent substitute for coffee and has many antioxidants as well as amino acids that both boost the immune system and provide you with a excellent energy all day and lift much like caffeine but with no jittery crash. It is very sought after once you try it it will be a staple in your daily diet.