I have experience from my uncle about vitamin B17 which helped him a lot with cancer. You can´t get it in common but you can get some from apricot seeds, but carefully with it they includes a little portion of kyanid (best if you make plan for consumption, he using 25 per day ( I think body weight matters so dont give childrens 25 or you poison them)). So i wanted to share my experience, i hope its help you could try it with your current therapy and maybe its help you....

There is more people but you could find them by your self on youtube and like that...

And at the end one recommandation from web:

ARE ALL APRICOT KERNELS THE SAME?
NO! What a lot of people do not consider when choosing an apricot kernel supplier is that apricot kernels (like all oil seeds) are very susceptible to moulds if not immediately dried to reduce the moisture levels that will inhibit mould growth.
One very dangerous mould that apricot kernels are susceptible to is aflatoxin. Aflatoxin is a fungus, a mycotoxin that is very toxic and carcinogenic to humans. It is known that chronic exposure will lead to a high chance of developing liver cancer. (ref: wikipedia)
It is not often easy to spot as the kernel husk (skin) can conceal the mouldy flesh underneath. The best way to avoid ingesting this toxic fungus is to not purchase kernels that are not assured that they have been dried immediately to a moisture level of under 7% within 48 hours of removal from the fruit and then stored in weatherproof conditions to keep moisture levels safe. So please take care when looking to purchase any fruit kernel.

So for the best buy fresh apricots and get kernel from them….

And dont misteake it with Laetrile is also based on this seed but it is not same think ....