Well, I was depressed when I was younger, and as such I ended up eating very little, and the food I ate wasn't really healthy. The longest I ever went without food was 3 days, at which point I fainted in a store... It was actually in IKEA of all places, so I hate going there now even more than I did before that incident.
But back to the topic... Going 1 day without food won't kill you, and it won't have much of an effect on you as long as you don't exert yourself and you eat properly the next day, other than making you very hungry and maybe feel a little weak.
If you hardly get any exercise though and you also drink alcohol? It's a pretty bad idea.