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by SapporoChris 1497 days ago
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2495396/

"A 27-year-old male patient fasted under supervision for 382 days and has subsequently maintained his normal weight."

By comparison 7 days is trivial. More to the point, a 7 day fast with medical supervision should be safe, if it is not, the supervisor will advise against it.