Yes there is. I have been boiling my own tea for 6 years. You can get a 3 month supply for around 75 dollars from HerbalHealer.com I don't sell anything. I also added red clover. A known blood purifier and also Montana Yew which ironically the pharmaceutical companies use to make a synthetic drug called Taxol, a known chemo drug.
I boil them 10 minutes. Let them set covered for 12 hours. Then strain it into 3 quart amber colored jars. I take 2 ounces 3 times a day. I am Stage IV Non-Hodgkins B-cell lymphoma for almost 7 years. Did not do chemo. I have had the best health of my life for the last 6 years. I have 5 grandchildren and 1 great granddaughter. If I can feel this good and live 5 more years. Lord willing 10 more years, then just let me keep the Cancer.