A connection I see is microbiota in your gut. Both antibiotics & fasting affect it (study on flies: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5988561/ https:

A connection I see is microbiota in your gut. Both antibiotics & fasting affect it (study on flies: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5988561/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5988561/) Maybe antibiotics kept under control a bad microorganism, but which had resistance not to be killed. Maybe fasting helped kill it. I'm not a doctor.