I had an "immediate transfusion" when I was pregnant. I was also described as "empty". I was too weak to do anything except go to doctors appointments, and fortunately, when I passed out, it was right in front of my gp who got an ambulance and took me straight to A&E. I had to stay in hospital for a whole weekend, and wasn't allowed to leave until my ferritin was "somewhere near normal". Then I had to go home and take pills the size of horse tranquillisers every day for the best part of a year. I wasn't allowed to drink caffeine with them, nor have much dairy (dairy inhibits absorption too), and had to drink gallons of orange juice (vitamin c helps absorption).
Her "doctor" sounds like my mechanic when I take the car in for the MOT. "sorry love, can't pass you your lights are empty, gonna have to just go on and fill those up with light for you that'll be £300 and you can be on your way".
THIS WOMAN IS ACTUALLY DANGEROUS. It was one thing when she was banging on about her overpriced swimwear and begging for free coffee machines, but this is so not ok. There'll be people out there who get the impression that their medical conditions shouldn't stop them from hiking/bootcamps/4am HIIT sessions, and cause themselves real harm.