anyone on 800 calories diet?

I've done it before , lost weight at first, then it came to a halt. Didnt have energy and I was tired and cranky.

I'm on an 800 calorie diet where I eat 800 calories, and then I eat 700 more. It's worked great for me.

I've been at/around 800-1000 since February. I haven't had any issues. I've had regular checkups/bloodtests/etc. Haven't felt bad. Get plenty of what I need, have tons of energy.

I do it every other day....800 then 1300. It works for me. Good Luck.

that's not even half what i eat...

You might knock a lot of pounds for the first 3-4 weeks., After that , you will hit a plateau .Your body will go into starvation mode and your metabolism will slow down.
You are better off eating 1700 odd calories and burning around 500 in the gym if you can. Or get at least 1400 in with a good combination of all macro nutrients. I am trying to make this change for myself for a lifetime and not for a few weeks. Just my 2 cents . Good luck.

I agree with the exercise, but I've done this since February. No plateau... no slowed metabolism. 9 months in, no plateau and a steady loss of weight.

I was once an 800 cal dieter! but no more! I lost 30lbs in about 3 months! but guess what? I regained 50lbs in less than 3 months! I was taking appetite suppressants to help me stay in the cal range. but my metabolism slowed and there was a time when I wouldn't even feel hungry and I would eat only 200-300 cals!!! the diet also discouraged exercise; which is obvious given that I was eating half of my BMR! then there was a time when I grew fed up of eating the same foods , I would often gag at the sight of lettuce! I began to get cranky, all I did was think about food. I began to dream food, wondering what else I could eat and yet stay within my range.
Thankfully, it only lasted 3 months; while I regained almost twice the weight I lost, at least I didn't do any permanent damage to my metabolism. Today, I exercise and I fuel my body, I eat 5-7 small meals a day between 2000-2700 cals (sometimes as much as 3000 cals according to my burn on that day) . I burn around 1000-1400 cals per day and I never NET below my BMR; which is 1586!

Moral of the story... do not net below your BMR! you must eat to fuel your body, build muscle and rave up your metabolism! ... and 800 cals will not do it!

I lived decades on about a 1000, It's all you need if you're lean enough. Find your TDEE and use that to calculate a reasonable deficit don't just pick a random number.

Starvation mode is a myth. I ate an average of 500-800 calories for a year and never hit a plateau. Then I relapsed into bulimia, and THAT'S when I hit a plateau. Forget starvation mode, even if you lose tons of weight, the health effects are not worth it - physical and mental. Only do this under careful doctor and psychologist supervision. There was a study done on healthy young men where they consumed a VLCD - the great majority of them developed eating disorders.

my supper sometime goes close to that...it's way too low.