From the last link by WS;
"Essiac is an herbal remedy that was prescribed and promoted for about 50 years by Rene M. Caisse, a Canadian nurse who died in 1978. Shortly before her death, she turned over the formula and manufacturing rights to the Resperin Corporation, a Canadian company that has provided it to patients under a special agreement with Canadian health officials. Several reports state that the formula contains burdock, Indian rhubarb, sorrel, and slippery elm, but there may be additional ingredients. Essiac tea claimed to be Caisse's original formulation is also marketed in the United States. Several animal tests using samples of Essiac have shown no antitumor activity. Nor did a review of data on 86 patients performed by the Canadian federal health department during the early 1980s"
86 case tests is less than Rene Caisse did in one of her 50 years of success with the formula.
My friend who just went through chemo has swollen legs, boils and a whole body rash from the chemo. He is starting back on the essiac, whole lemon, and ganoderma lucidum with green tea as soon as he gets off cortisone shots for the chemo reaction.