The point is that some companies put over 40% zinc chloride in their black salves and this is way to much. With this much zinc chloride it will burn your skin and can cause serious perminent damage. The black salves at http://www.bloodrootproducts.com/black_salve.htm
Has a zinc chloride content from 5-30% depending on the type of black salve or black salve oil required for the cancer.
Bloodroot oil is better for recal or prostate cancer. Not as hot (less zinc chloride)