Essiac tea is an herbal concoction composed of Burdock, Indian Rhubarb, Sorrel, Slippery Elm and other ingredients. It was developed by a nurse in Canada, Rene Caisse (Essiac is Caisse spelled backward). Caisse gave the formula to a company in Canada who markets the product today. Indian Rhubarb contains benzaldehyde, one of the components of Amygdalin (Laetrile). Many alternative physicians use Essiac to help cleanse the blood, especially if a patient has been on chemotherapy or radiation. Note: Not all formulas being sold today are authentic. To read more about Essiac go to Rene Caisse’s story.