Speaking just for myself, the approach I take is to always talk to my doctor about any supplement, "natural" or otherwise. I don't want anything to interfere with the meds I'm taking, which are doing a good job. Even natural/herbal remedies can react badly with a drug or hinder the work that drug is doing.

I started taking Host Defense turkey tail mushroom and Dr Beckers BioNutrients mushroom complex and cordyceps mushroom supplements and have noticed a great improvement in my back pain and I noticed a rise in my energy level and just an all around better feeling easier to move when before I was slow did not have hardly any energy and when I did move it hurt so bad I just wanted to stay in bed.

Japan Asia and China have approved these mushrooms and they are used along with chemo treatments to lessen side effects and now I can see why.

I have been taking it for years. Not sure if it really helps but my MM dr is ok with it and my naturopathic dr wants me to take it.

I have no expeience with it, but ask your doctor if there's some kind of digestive enzyme you can take to relieve you stomach distress

I haven't tried it yet. What type of cancer does the doctor have?