Essiac Tea Extra Strength with 25% Sheep Sorrel Root. To give your immune system an extra boost. 2 OZ. size will make 1 Gallon of the finest Essiac tea on the Planet. 2 1/2 times more Sheep Sorrel Root. The root is "very essential" and isn't Essiac tea without it. This tea gives you the choice for a stronger detox without drinking twice as much tea. It's a personal choice our tea maker wanted you to have.