Jerry Nadler, lose weight? You crack me up. :^D
Nadler weighed around 400 pounds, some said more.
In 2002 and 2003, Nadler had laparoscopic duodenal switch surgery which is a stomach stapling surgical procedure and he had side effects of nausea and inability to process food, leading to fainting feelings.
article: May 23, 2019. On Friday at a New York event with New York City Mayor Bill de Blasio he appeared to almost pass out. (DeBlasio asked "Are you alright?" Nadler faintly said "No."