You will add 2-ounces of this root beer extract to 14-ounces of regular kombucha. Then you will let it second ferment.
* There are warnings on sassafras bark which caused much controversy and in 1960, the U.S. Food and Drug Administration banned sassafras as a potential carcinogen. Lab rats were fed huge amounts of sassafras and caused the FDA to label this product not safe, but in small amounts it is actually has protective qualities and it was discovered only the oil consumed in large amounts was dangerous. Newer methods found a way to remove the oils from sassafras.