For one, her diet is for a short period of time. Also they likely (if it carried on for an extended period of time) had her taking or drinking suppliments and were keeping an eye on her.
When Opra went on a 1000 calorie a day diet she had to see the doctor every day.
In my experience, it’s not goot to really cut calories. I used to go days without eating as a teenager, just to test my bodies strength. It came with a weaker immune system and other issues but eventually I stopped around 17 years old and started eating too much.
When I became over weight I decided to diet. I cut my calories to 500 calories a day. I would only eat like rice cakes and things like that, low cal yogurt etc.
Then I fainted. At 21 years old I was at work and fainted and stopped breathing for nearly 3 minutes. I’d been on my diet about 5 months and had lost a lot of weight but it almost cost me my life. My heart had gotten weak and tried to give out.
I still kept on with my diet. About 2 months later I started having an irregular heart beat. I would be watching TV and my heart would speed up really fast and be pounding and then it would stop and miss a couple beats. I eventually went to the doctor who ran some tests and my heart had become to weak at just 21 years old because of the diet that only lasted 7 months.
Now the issue with starvation mode is your body feeds off of your muscles when it’s not getting enough food. And the biggest muscle in your body? Your heart. That’s why so many women with eating disorders have heart attacks.
Part of this has to do with calorie consumption. Depending on your height physical activity and weight you should consume between 1,600 and 2,200 calories a day average.
I had to see a nutritionist to have my body get back on track. I couldn’t just force myself to eat “normal” after that time because my body would reject it so I had to gradually increase my diet.
When I started eating healthy meals and spreading them out to 5 meals a day I lost more weight faster than my low cal diet.
My 5 meal diet was something like this:
7am: I would eat a bananna and some low cal yogurt for breakfast (or strawberries and yogurt when I wanted to change it up
10am: I would eat a snack with peanuts or peanut butter to ensure I got enough protein. Like peanut butter on some crackers or another bannana
1pm: I would eat a sandwhich on whole wheat bread (and I dislike whole wheat but you get used to it) with some low cal popcorn or chips
4pm: I would eat dinner, usually some form of baked chicken with a couple veggies on the side
7pm: I would eat a 100 calorie pack, the muffins cupcakes or something of the sort to help my sweet tooth.
This really helped to lose weight the healthy way and I was running on the elliptical for about 30-45 minutes per day. I felt healthier and lost weight faster and ended up passing my weight loss goal but the healthy route.
If you eat more frequently throughout the day and keep it at a set time every day your body knows it wont have to store any extra food and digests more quickly. It also helps when you want to pig out knowing you only have three hours to wait for your next meal. And I always allowed a meal on Saturdays to be my “anything goes” meal. I would pick one meal that I could eat, steak, fast food, burger, anything I wanted and would look forward to that day all week. And when you know you’re going to be able to eat whatever you want for one meal that week, it helps keep you motivated to keep on track
I did more than try to answer your qustion and I’m sorry for typing so much but cutting your calories drastically is dangerous and I still have heart problems from it