Good evening @marthamurphysc, it is great to meet you. Do you remember the name of the publication? I see that @johnbishop has responded to your post about fasting. I think he has the answer to your questions. So....maybe we can get him back here to explain the process in greater detail for you. Here is the link to the LCHF intermittent fasting support group.
https://connect.mayoclinic.org/group/lchf-living-intermittent-fasting/.
I do know that John has no pain with his small fiber peripheral neuropathy. However, his other symptoms do require attention and persistence.

Is it you or your husband that is dealing with neuropathy pain and discomfort?

May you be free of suffering and the causes of suffering.
Chris