answer:Wow. The short answer is probably not, on the other hand, you shared not much other than your desire to eat broccoli & lose weight in a week. What does your doctor say? Are you still overweight? Do you have any known health problems? Do you have a history of constipation? Is this a wrestling thing? Are you on “The Biggest Loser”? Nobody here is probably actually qualified to answer that question and keep you safe. That said, a vegetarian diet for a week shouldn’t kill you.