This is called intermittent fasting (one way to do it), and there is some very interesting research (on mice) that suggests caloric restriction to a few hours a day has positive effects on obesity and diabetes. Science Friday episode with one of the researchers: http://www.sciencefriday.com/segment/12/05/2014/you-are-when...

Another of my kind! I've been eating once a day for about 2 years now.

This is obviously just anecdotal, but for me, I certainly feel more mentally alert during a fasted state; though I wouldn't say I've been sick any more / less than other times in my life.

Friends think I'm quite bizarre for eating this way - but it just seems to work for me.

When do you eat that one meal of the day, and what does it typically consist of?

I've been doing something similar over the last few months - a very light breakfast, a solid lunch, and then no dinner - but for me, doing this was with the purpose of losing weight - which did happen, at the rate of just under 1 kg a week.

I eat dinner only, quite a lot for dinner and I can graze for the rest of the night. I like going to bed with a full stomach. I don't really get hungry during the day, drink plenty of water and exercise at 3:30, then I'm hungry after that. I eat most stuff, but keep pretty low on sugars, starchy stuff and eat more fat than most.

Friends also think it's a bit bizarre, but it works for me too and I'm used to it. Definitely feel more mentally alert - all the time, and don't get the after lunch tiredness anymore.

How many meals worth do you eat once? Do you eat the equivalent calories of three meals in one?

Not sure, I can eat quite a lot, I do a lot of exercise and I'm pretty lean. I just eat until I'm full, might have a few snacks later.

FWIW, eating once a day is recommended in the "Hacker Diet" book, written by the author of Autocad. The book says multiple (smaller) meals are fine too, but you have to read it yourself, I won't do it justice here.

"but you have to read it yourself"

Also, you need to try it yourself. Every body is different.

You should try things like multiple small meals, or one big meal, or no carbs, or no gluten and honestly evaluate how they impact your life.

Perhaps an unusual question, but how do bowel movements work for you, and was there a transition period?

Whenever I try eating once a day or a fast, I feel fine, except that without fail I have diarrhea.

All good - no problems, I think from memory that it's probably now less frequent

What sorts of meals are you eating when doing it once a day? Are they big/small meals, or a mix of the two?

One big meal at dinner and a bit of grazing, although if I eat enough fat I don't feel like grazing later. I'm not completely militant about it, if someone asks me to meet up for lunch I'll go, but 95% of the time I stick with it. Plus it's nice to only have to make one decision about food a day and you save some $ from not buying lunch each day.

I just stopped working in an office for that effect.