Hi @TempersFuggit. I am so sorry your dd is going through this. 500 calories or less than 500 calories seems to be a really common number so I do wonder if there is something genetic about this. I can only tell you what I’ve read online about refeeding syndrome and how I got my dd to eat more.
The programmes I have read about range in how they approach increasing calories over time, some faster to increase calories than others. Not only does this reduce the risk of refeeding syndrome, it also reduces the risk of stomach discomfort, where the stomach and intestines have quite a workout and get stretched too quickly, which causes a lot of discomfort. Eating too much in one go can also lead very rarely to the stomach being unable to empty, which is a medical emergency.
It is unlikely that you would be unable to get your dd to eat a lot more all in one go without being taught how to do it or forcing complete compliance. Anorexia is based on rules. My dd had a rule of not eating til 8pm and only one meal. Your dd’s rule is intermittent fasting.
At first, I focused solely on increasing dd’s intake by an imperceptible level. This was possible because I made her food and took it to her. She would only eat carrot sticks and hummus with grapes. I weighed the sticks used the same pot every day to put them in and every day I gave her a couple more sticks and more sticks meant more hummus. Over time, I discovered tricks to get her to eat more hummus such as not giving her an almost full pot as she would stop at the end of the pot, whereas if I gave her a half full pot she would open a new one and in the end was eating more than a whole pot in one sitting without realising.
I also went for the most calorific hummus I could find and bought that. Circa once a week she would eat tortilla chips and sour cream and chive dip. This meant she was eating about 1000 calories that day, sometimes more and I bought the most calorific one I could find.
As for refeeding syndrome, the more conservative programme I have read no more than 20% increased intake at a time and not to increase by more than every 3 days. If your dd were an inpatient they would do that a lot faster but will be monitoring and potentially administering supplements. I can’t find that link. But there’s this one 200-300 calories every 3-5 days. https://www.osmosis.org/answers/refeeding-syndrome
I would buy the book published by New Maudsley Skills based learning for carers https://www.amazon.co.uk/Skills-based-Caring-Loved-Eating-Disorder/dp/1138826634/ref=sr_1_2?crid=2GVL4KT2X3DZY&dib=eyJ2IjoiMSJ9.-0rmYJiLLn5-LH6mc42_33-zpvsZdCy9VlBkxxZUijeDrXOCDyskPOXwKozmH33NxQCrZgqmJHcpQlsPXOfdUkcypBhzZ_msX83TWZ5jFXIf0nm9VnnARpeqwZd9rfuR6iwoCyyhQmhDIEjZElvwtOqL1RNZrLQ49hwvcdGagWlJtEzLJm4Vu4qV0PfmlEywWQuM7P-I6tJZZdR670Eqy_exXP9UeH0pANk92TWAstI.3I633F3TEV5DGUWABLLPT2ZVvboRokI28la1NvEnW-w&dib_tag=se&keywords=Skills+based+learning+eating&nsdOptOutParam=true&qid=1732946599&s=books&sprefix=skills+based+learning+eating%2Cstripbooks%2C85&sr=1-2. You can also contact Jenny Langley. she is fab. And worked with others to write the new maudsley guidelines. https://newmaudsleycarers-kent.co.uk/carer-workshop-dates/. Idk if she has any workshops as she’s going to do something else shortly for 3 months after Christmas. She does one offs and has carer support groups. If you email her she will let you know what she has coming up. She has one off workshops next week as I’m attending one.
Jenny works for the Charlie Waller trust. They do the courses. I’ve done the one with Catherine O’Dea Hughes. https://www.charliewaller.org/what-we-offer/eating-disorder-workshops-for-parents-and-carers She’s doing an intensive starting on Friday. Last I heard there are still places.
Wishing you all the best.