As someone who has lived on 1000 calories a day for 6 months I can confirm some upsides.
>you're more alert.
It's like a your body is looking for food constantly because it's not getting enough, almost like a mild caffeine but fueled by despiration.
>you get used to the hunger
After about two months you can't eat large meals anymore, your stomach feels incredibly full after a medium sized meal, which if you eat will be the only one for the day. I once ate a Large fry from Mcdonalds and felt like my stomach was going to explode. Hunger also feels different on that diet, it's more of a constant background pain in your stomach as opposed to just feeling really empty when you're hungry. Take vitamin pills.
>sluggishness isn't a thing
You definitely never feel lazy or sluggish, you just get over exerted if you move too much. Waking up becomes a lot easier, it's super easy to spring out of bed and get moving, just don't move too much or else you'll feel exhausted.
Some of the negatives:
>if you do any manual labor at all you feel like you're going to die.
>the first month or so is really painful
It's the worst, your body almost goes into shock. Basically, stay bed-ridden for the first month.
>if you're a smoker it gets ugly
I am a smoker, it definitely ramps up your nicotine intake tenfold because you always feel hungry and just naturally start smoking more to feel less hungry. Went from 4-5 cigs a day to a pack or more just to stave off hunger. Idk how it would be possible to do this diet without smoking either.
>when you switch back to a regular diet you feel horrible.
Seriously, you just want to sleep all day in a cave and hibernate. You feel incredibly sluggish and laggy. I swear I dropped 10 IQ points for the first month of switching back to 2000+ calories a day.
