Funny how that works. I had an issue with my eye/glaucoma where I didn't eat o sleep for 12 days because it hurt too bad to even get out of bed (imagine your worst hangover x 10, combined with your worst day after a workout soreness x 10), and the 2 Ritz crackers I tried to consume came up immediately.  Lost 13 lbs.  If fasting for 12 days isn't "starvation mode", I don't know what is.