It's a password recovery program :) but also for other things.
I am not sure but three days without food is harsh and sounds something that's not sustainable at all. But I can imagine with such calorie restriction, she'd lose the weight extremely fast, could be water, could be fat. And you're such a good friend for motivating her, it's tough journey and be kind to her hehehe
I get scared for her 😂... I stayed six hours without food, I almost died 😂😂. The moment she says I'm started my fast today, I'm already calling and texting lol.