When I was 20, my fiance (he was 25) of 2 years left me for a 17yr old we worked with and he had been cheating on me with. I ended up losing 30lbs in a month from not eating. I drank water. I got a double quarter pounder from McD's, it took me a couple days to finish eating it. I could only take a bite every so often. I had to slowly work my way back to eating more. Another time I lost weight was about 6 years ago. We thought I was having allergic reactions to a food, but didn't know what (after months, we found out they were panic attacks), so I lost over 20lbs from not really eating anything except bagged pretzels and water. This is when my Uncles gf decided to worry my father by telling him I'm making myself sick by purposely starving myself to lose weight, causing him to panic.