Of course! The one I tried was from Mayo or Harvard Med (I have a new phone and can't find the exact study) and was supposed to be about 24 hours before chemo, eating after.

Since my chemo was at 10 I technically could have breakfast but I was way less hungry if I skipped it so I ended up doing a 36 hour fast or so. So for a Tuesday infusion I ate dinner Sunday night and then didn't eat Monday, breaking the fast after chemo.

I was about 60 pounds heavier than I am now, so maybe that helped me. I also didn't stay on top of my constipation medicine at first and that was a big mistake. But overall the fasting was about the easiest thing I did, and I didn't get too nauseous.

I also tried to have at least 13 hours between dinner and breakfast, which I still do.

Search Dr Valter Longo’s fasting protocol for chemo. My daughter used it and her immediate side effects were some nausea and fatigue