Trisha,
Christine is correct! Laetrile, also known as B-17, are Apricot pits, and can be poisonous like Cynide, and such treatment is banned by the FDA. Late actor Steve McQueen used that in Mexico before his death in 1980.
I’ve had cancer 7x, and wouldn’t touch that with a 10 foot pole! I would be open to adequate nutrition, improving my immune system, light exercise to help get through Chemo, which sounds like it may be “induction chemo”, which are several high dose chemo combinations, including targeted therapies now, and possibly, and that’s only if my doctors suggests, certain vitamins if I’m deficient. With these chemo’s he is going to be taking so many medications to help with adverse effects that any can negatively interact with them and chemo. Vitamins and supplements aren’t overseen by the FDA, so there’s all kind of stuff out there, including fraud and potencies.
Good luck