I used to consume 500-700 calories a day, it’s called the Korean model diet. Typically a lot of water throughout the day, 1 banana for breakfast, salad with no dressing, and a small meal for dinner.

I did this for 3 months. I would workout 2 times a day. Once in the morning I would jog on the treadmill for about 1 hour, or until the machine said anywhere from 800-1000 calories based on my weight. At night I would weight-lift, let’s say 100-200 calories. Since weightlifting doesn’t burn a lot of calories initially. I obviously burned calories too by having to walk around throughout the day, let’s say 300-500 calories. Right there is a consumption of 500-700 and a deficit of 1200-1700.

You basically need dedication. Not a lot of people have that 🤷‍♂️