I'm watching this thread and really find it interesting. Otzi, you are being a terrific coach and a great source of info.
My initial thought when I first saw it was - huh? What's this doing here? But now I can see the merit to it.
Calorie restriction. 10 days is nothing in the scheme of things. Even if we ignore the feast/famine lifestyle of Grok, there are some modern reasons why we might just naturally decrease our calorie intake: grief, deadlines, finals, other stressors. And, one of the videos on fasting (the one where the British man does 5:2 fasting) had a 101 year old man finishing a marathon, and he'd been "eating like a child" (his translator's way of explaining small portions and low calorie) all his life.
Just potatoes. I'm guessing (like many in this thread) that doing all carb or all protein or all fat would probably result in weight loss. I used to live on vegetable soup from 5:30 pm Friday night to 9:30 Monday morning almost out of necessity because of a job I had where I worked 40 hours in that timeframe. The veggie soup was from a place across the street - cheap, easy to get, and stood up well to cooling down. I was usually lighter on Monday morning. (No surprise there.)
Otzi, I'm wondering what you think of soup idea? Potatoes, small amount of carrots, onion, and celery. Rather than homemade bone broth, which I have no idea if one doesn't have a calorimeter how to know how much fat is in it, maybe a store bought decent non/low fat (ogodisaidlowfatonMDA) broth? Would this be the same type of thing? Do the onion and celery have too much fiber? The onion and carrot too much sugar? I'd really appreciate your input. Thanx.
As a note, I love mustard on potatoes. Reminds me of the potato knishes we used to buy off the carts.