I do not read studies, but this pops from google [1]
Potato diet is a baseline in fasting community. Before you do long water fast, you need to go on detox. Doing potato diet for couple of weeks is strongly recommended.
Your linked study did exactly what I cautioned against. It's in-vitro. It's pointing to potential mechanisms, not a clinical outcome on patients. I know you said you don't read studies, but maybe it's a good idea before drawing conclusions.