I don’t know. I bought this bottle for $35 to help with whatever ails me, insomnia, pain and what not but have seen no result on any of these concerns. The woman that sold it said several of her clients had used it on their skin cancers with good effect so I’ll try that at least locally as I see I have one spot where my glasses irritate my skin that will need to be removed at some point, think how wonderful it would be to be able to treat the skin cancer locally instead of having it burnt off leaving a scar. No harm trying.