The 800 calories they are eating doesn't seem terribly healthy: "patients were asked to follow either a ‘home-made’ milk- and fruit-juice-based diet (811 kcal/day, 64 g protein, 132 g carbohydrate, 6 g fat) with a multivitamin/mineral supplement (Forceval® [Alliance]), or a micronutrient-replete commercial LELD (832 kcal/day, 87 g protein, 120 g carbohydrate, 12 g fat). I imagine these people are probably staving...…
Which sounds more sustainable? Drinking 800 calories of milk and juice every day, or eating real food like steak and broccoli, or chicken with brussel sprouts, or bacon and eggs?
I am losing weight and reducing my A1c eating about 1300 calories of real food each day, and it doesn't leave me hungry at all. Keto is a very sustainable way of eating (in that you can keep doing it without misery). This "diet" looks like hell.