I chose NO chemo after my breast cancer diagnosis. Some of the best things that she can do to boost her immune system along with a paleo/keto diet are:
Vit. D3 = get her level tested, pt's with active cancer are recommended to have there level around 70-80.
Melatonin = even my oncologist said this was a winner and that studies say it's helpful for breast cancer pt's.
IP6 = supplement to boost her NK (natural killer) cells in her body - read up on it, there are some good studies on it.
The tumeric is a great addition since cancer cells are 'sticky' cells anyway.
Hope this helps and I wish her well.
Some people just need a sympathetic pat... On the head... With a hammer.