I am a 22 year Cancer Survivor, Hodgekins Lymphoma, when I was receiving
chemotherapy this was the advice my hemotologist gave me: NEVER EAT ANYTHING DURING CHEMOTHERAPY THAT IS AMONG YOUR FAVORITE FOODS. Reason: the taste will be associated with chemotherapy, it will bring back the nausea feeling, which at the time I didn't believe so I ate pistachio nuts and to this day I can not eat them, they were so so so so correct. I was advised never to eat: Hot dogs, sodium meats such as: Bacon, Sausages. No rice or nuts, why? I don't know actually. Keep dairy at a minimal. I know that for me dairy upset my stomach which added to the nausea.
The best thing to offer is fruit & vegetables, non cream soups. I ate red meat sparingly.
One thing to remember, during chemo your appetite is very minimal, just to eat, for me was such an effort. My taste buds became sensetive to spices, it seemed to magnify and excellerate the potency of each spice, which I would have to drink milk if my tounge became enflamed (for lack of better words. I lived on french onion soup, chicken noodle stars, and ramen chicken soup. I ate lots of fruit (no banan's seemed to upset my stomach) I ate mostly watermelon.
Curiously, never wear or use perfumes during chemotherapy, the scent, if smelled will bring back, almost instantly, nausea of chemotherapy, this I found out on my own, In 1985, Musk colognes were the rage, I loved them at the time, but... 22 years later If I even get a whiff of any musk scented anything, I get dizzy and experience heavy nausea.
I hope this helps. This was my own personal experience. This is something I personally will never forget, and If ever given an opportunity to aide and help, even in advice, any fellow cancer victims, it is my personal privledge and honor to assist. God Bless and I hope all is healed for your friend, I will keep that person in my prayers.