I saw a presentation last year by Cristina Sanchez, who has been doing research as part of a research group in Spain on Cannibinoids and cancer for 10 years. She showed a report where they studied mice with HER2+ breast cancer. CBD alone kills cancer cells, prevent them from growing, and prevent them from developing. The CBD combined with chemo doubled the effectiveness of the chemo, and when taken with radiation and greatly increased the effectiveness of the radiation. I wish I could find a copy of her report online.
I bought some ACDC oil (very high ratio of CBD:THC). I took it a little while and then lost interest because the other stuff I was doing was effective enough.
Since I've gotten my recurrence, I've been taking it religiously. I take it at night, which helps my sleep. If I take too much I get a headache. The recommendation that I was given was to take 150mg per day while I was taking Herceptin and Perjeta neo-adjuvantly. However, I never worked up to that high of a dose.
Here is a presentation that she gave:
https://www.youtube.com/watch?v=fTtnSlWLcyc